Meaning: 'Consist' means to be composed or made up of something.

Wrong options:

• promise: 'Promise' is a noun or verb that indicates a commitment, which does not fit the context of describing what context clues are made of.
• common: 'Common' is an adjective that describes something usual or frequent, which does not fit as it does not describe the composition of context clues.
• constitute: 'Constitute' is a verb that means to make up or form something, but it is less appropriate than 'consist' in this context as it implies a more formal or legal formation.
• ensure: 'Ensure' is a verb that means to make certain, which does not fit grammatically as it does not describe the composition of context clues.
• concentration: 'Concentration' is a noun that refers to the act of focusing, which does not fit as it does not describe what context clues are made of.
• individual: 'Individual' is an adjective or noun that refers to a single entity, which does not fit as it does not describe the composition of context clues.

Correct answer: individual

Explanation: The term 'individual' is used as a noun to refer to single words, fitting grammatically as it aligns with the context of discussing words that need to be defined. It is appropriate in this context as it refers to each word separately.

Meaning: 'Individual' refers to a single person or thing, in this case, a single word.

Wrong options:

• consist: 'Consist' is a verb that describes composition, which does not fit as it does not refer to a word or entity.
• promise: 'Promise' is a noun or verb that indicates a commitment, which does not relate to the context of discussing words.
• common: 'Common' is an adjective that describes something usual, which does not fit as it does not refer to a single word.
• ensure: 'Ensure' is a verb that means to make certain, which does not fit as it does not refer to a word.
• concentration: 'Concentration' is a noun that refers to the act of focusing, which does not fit as it does not refer to a word.
• constitute: 'Constitute' is a verb that means to make up or form something, which does not fit as it does not refer to a word.

Correct answer: ensure

Explanation: The word 'ensure' is a verb that means to make certain, fitting grammatically as it describes the action of achieving a high level of focus. It aligns with the context of reading and comprehension.

Meaning: 'Ensure' means to make certain that something will happen or be the case.

Wrong options:

• consist: 'Consist' is a verb that describes composition, which does not fit as it does not convey the action of achieving focus.
• promise: 'Promise' is a noun or verb that indicates a commitment, which does not fit in the context of ensuring focus.
• common: 'Common' is an adjective that describes something usual, which does not fit as it does not convey an action.
• individual: 'Individual' is a noun or adjective that refers to a single entity, which does not fit as it does not convey an action.
• concentration: 'Concentration' is a noun that refers to the act of focusing, which does not fit as it does not convey an action.
• constitute: 'Constitute' is a verb that means to make up or form something, which does not fit as it does not convey the action of achieving focus.

Correct answer: concentration

Explanation: The word 'concentration' is a noun that refers to the act of focusing one's attention, fitting grammatically as it serves as the object of the verb 'breaking.' It aligns with the context of discussing the focus required for reading.

Meaning: 'Concentration' refers to the ability to focus one's attention on a particular task or subject.

Wrong options:

• consist: 'Consist' is a verb that describes composition, which does not fit as it does not refer to the act of focusing.
• promise: 'Promise' is a noun or verb that indicates a commitment, which does not fit as it does not relate to focus or attention.
• common: 'Common' is an adjective that describes something usual, which does not fit as it does not refer to the act of focusing.
• individual: 'Individual' is a noun or adjective that refers to a single entity, which does not fit as it does not refer to the act of focusing.
• ensure: 'Ensure' is a verb that means to make certain, which does not fit as it does not refer to the act of focusing.
• constitute: 'Constitute' is a verb that means to make up or form something, which does not fit as it does not refer to the act of focusing.