Meaning: 'Urban' refers to areas characteristic of a city or town, particularly in terms of infrastructure and population density.

Wrong options:

• furthermore: 'Furthermore' is an adverb used to add information, which does not fit grammatically or contextually as it does not describe streets.
• the: 'The' is a definite article that does not provide descriptive information about the streets and is not suitable in this context.
• vehicles: 'Vehicles' is a noun that does not fit as it does not describe the type of streets.
• scepticism: 'Scepticism' is a noun that refers to doubt or disbelief, which does not relate to the description of streets.
• weather: 'Weather' is a noun that refers to atmospheric conditions, which does not fit the context of describing streets.
• but: 'But' is a conjunction used to contrast ideas, which does not fit grammatically or contextually in this position.

Correct answer: vehicles

Explanation: The term 'vehicles' is a plural noun that refers to the autonomous machines being discussed. It fits grammatically as it is the subject of the sentence and aligns with the context of the transition to autonomous technology.

Meaning: 'Vehicles' refers to machines, such as cars or trucks, that are used for transportation.

Wrong options:

• furthermore: 'Furthermore' is an adverb that does not fit as it does not refer to a noun or subject in this context.
• urban: 'Urban' is an adjective that describes a type of area, not a noun, and does not fit here.
• scepticism: 'Scepticism' is a noun that refers to doubt, which does not relate to the subject of the sentence.
• weather: 'Weather' is a noun that refers to atmospheric conditions, which does not fit as it does not relate to the subject of vehicles.
• innovative: 'Innovative' is an adjective that describes something new or creative, which does not fit as it does not refer to a noun.

Correct answer: weather

Explanation: The word 'weather' is a noun that refers to atmospheric conditions, which is relevant in the context of discussing challenges faced by autonomous vehicles. It fits grammatically as it serves as the object of the preposition 'in' and aligns with the context of safety concerns.

Meaning: 'Weather' refers to the state of the atmosphere at a particular place and time, including conditions like rain, snow, or fog.

Wrong options:

• furthermore: 'Furthermore' is an adverb that adds information but does not relate to the noun needed in this context.
• urban: 'Urban' is an adjective that describes a type of area, not a noun, and does not fit here.
• vehicles: 'Vehicles' is a noun that does not fit as it does not relate to atmospheric conditions.
• scepticism: 'Scepticism' is a noun that refers to doubt, which does not fit the context of discussing weather conditions.
• innovative: 'Innovative' is an adjective that describes something new or creative, which does not fit as it does not refer to a noun.

Correct answer: innovative

Explanation: The term 'innovative' is an adjective that describes the safety features being implemented. It fits grammatically as it modifies the noun 'features' and aligns with the context of discussing advancements in safety technology.

Meaning: 'Innovative' refers to introducing new ideas or methods, particularly in technology or design.

Wrong options:

• furthermore: 'Furthermore' is an adverb that adds information but does not describe the noun needed in this context.
• urban: 'Urban' is an adjective that describes a type of area, not a noun, and does not fit here.
• vehicles: 'Vehicles' is a noun that does not fit as it does not describe the safety features.
• scepticism: 'Scepticism' is a noun that refers to doubt, which does not fit the context of describing safety features.
• weather: 'Weather' is a noun that refers to atmospheric conditions, which does not fit as it does not relate to safety features.

Correct answer: scepticism

Explanation: The word 'scepticism' is a noun that refers to doubt or disbelief, which is relevant in the context of public acceptance of autonomous vehicles. It fits grammatically as it serves as the object of the verb 'expressing' and aligns with the context of discussing concerns about relinquishing control.

Meaning: 'Scepticism' refers to a feeling of doubt or uncertainty about something, in this case, the trust in autonomous vehicles.

Wrong options:

• furthermore: 'Furthermore' is an adverb that adds information but does not fit as it does not relate to the expression of doubt.
• urban: 'Urban' is an adjective that describes a type of area, not a noun, and does not fit here.
• vehicles: 'Vehicles' is a noun that does not fit as it does not relate to the expression of scepticism.
• weather: 'Weather' is a noun that refers to atmospheric conditions, which does not fit the context of expressing doubt.
• innovative: 'Innovative' is an adjective that describes something new or creative, which does not fit as it does not relate to the expression of scepticism.