Meaning: 'Experts' are individuals who have a deep understanding or knowledge in a specific area, in this case, economics.

Wrong options:

• supports: 'Supports' is a verb that does not fit as a subject in this context, as it implies providing assistance rather than identifying a group of people.
• similarities: 'Similarities' is a plural noun that refers to common traits, which does not fit as it does not describe a group of individuals.
• energy: 'Energy' is a noun that refers to a resource, which does not fit as it does not describe a group of people.
• expensive: 'Expensive' is an adjective that describes high cost, which does not fit as it does not refer to a group of individuals.
• assess: 'Assess' is a verb that indicates an action, which does not fit as it does not describe a group of people.
• monitors: 'Monitors' is a verb that indicates an action of observing, which does not fit as it does not describe a group of individuals.
• hence: 'Hence' is an adverb that indicates a conclusion or result, which does not fit as it does not describe a group of individuals.

Correct answer: assess

Explanation: The verb 'assess' is used here to indicate the action of evaluating or estimating the cost of items. It fits grammatically as it follows the subject 'experts' and aligns with the context of analyzing economic information.

Meaning: 'Assess' means to evaluate or estimate the nature, ability, or quality of something, in this case, the cost of items.

Wrong options:

• supports: 'Supports' is a verb that implies providing assistance, which does not fit the context of evaluating costs.
• experts: 'Experts' is a noun and does not fit grammatically as it cannot serve as a verb in this context.
• energy: 'Energy' is a noun that refers to a resource, which does not fit as it does not indicate an action.
• expensive: 'Expensive' is an adjective that describes high cost, which does not fit as it does not indicate an action.
• similarities: 'Similarities' is a noun that refers to common traits, which does not fit as it does not indicate an action.
• monitors: 'Monitors' is a verb that indicates observing, which does not fit the context of evaluating costs.
• hence: 'Hence' is an adverb that indicates a conclusion or result, which does not fit as it does not indicate an action.

Correct answer: similarities

Explanation: The noun 'similarities' refers to the common traits or characteristics found between the cities. It fits grammatically as a plural noun that serves as the object of the sentence, aligning with the context of comparing cities.

Meaning: 'Similarities' are the qualities or conditions of being alike, in this case, between different cities.

Wrong options:

• supports: 'Supports' is a verb that implies providing assistance, which does not fit as it does not refer to traits or characteristics.
• experts: 'Experts' is a noun that refers to knowledgeable individuals, which does not fit as it does not describe traits or characteristics.
• energy: 'Energy' is a noun that refers to a resource, which does not fit as it does not describe traits or characteristics.
• expensive: 'Expensive' is an adjective that describes high cost, which does not fit as it does not describe traits or characteristics.
• assess: 'Assess' is a verb that indicates an action, which does not fit as it does not describe traits or characteristics.
• monitors: 'Monitors' is a verb that indicates observing, which does not fit as it does not describe traits or characteristics.
• hence: 'Hence' is an adverb that indicates a conclusion or result, which does not fit as it does not describe traits or characteristics.

Correct answer: potential

Explanation: The noun 'potential' refers to the capacity or possibility for something to happen, which fits grammatically as a singular noun that serves as the subject of the clause. It aligns with the context of discussing countries that could rank highly.

Meaning: 'Potential' refers to the inherent ability or capacity for growth or development, in this case, the possibility of being number one.

Wrong options:

• supports: 'Supports' is a verb that implies providing assistance, which does not fit as it does not describe a capacity or possibility.
• experts: 'Experts' is a noun that refers to knowledgeable individuals, which does not fit as it does not describe a capacity or possibility.
• energy: 'Energy' is a noun that refers to a resource, which does not fit as it does not describe a capacity or possibility.
• expensive: 'Expensive' is an adjective that describes high cost, which does not fit as it does not describe a capacity or possibility.
• assess: 'Assess' is a verb that indicates an action, which does not fit as it does not describe a capacity or possibility.
• monitors: 'Monitors' is a verb that indicates observing, which does not fit as it does not describe a capacity or possibility.
• hence: 'Hence' is an adverb that indicates a conclusion or result, which does not fit as it does not describe a capacity or possibility.

Correct answer: energy

Explanation: The noun 'energy' refers to a resource that is significant in the context of economic evaluation. It fits grammatically as a singular noun that serves as the object of the sentence, aligning with the context of discussing exports.

Meaning: 'Energy' refers to resources such as oil and gas that are produced and exported by countries.

Wrong options:

• supports: 'Supports' is a verb that implies providing assistance, which does not fit as it does not refer to a resource.
• experts: 'Experts' is a noun that refers to knowledgeable individuals, which does not fit as it does not refer to a resource.
• similarities: 'Similarities' is a noun that refers to common traits, which does not fit as it does not refer to a resource.
• expensive: 'Expensive' is an adjective that describes high cost, which does not fit as it does not refer to a resource.
• assess: 'Assess' is a verb that indicates an action, which does not fit as it does not refer to a resource.
• monitors: 'Monitors' is a verb that indicates observing, which does not fit as it does not refer to a resource.
• hence: 'Hence' is an adverb that indicates a conclusion or result, which does not fit as it does not refer to a resource.