Meaning: 'Instance' refers to a specific example or occurrence of something.

Wrong options:

• describe: The verb 'describe' does not fit grammatically as it does not serve as a noun in this context.
• behalf: The noun 'behalf' refers to representing someone, which does not relate to the context of a car mechanic's work.
• highlight: The verb 'highlight' does not fit as it does not serve as a noun and does not relate to the role of a mechanic.
• exemplifying: The gerund 'exemplifying' does not fit grammatically as it does not serve as a noun and does not appropriately describe the mechanic's role.

Correct answer: highlight

Explanation: The verb 'highlight' fits grammatically as it indicates an action that the system can perform. It aligns with the context of identifying dangers on the road, making it a suitable choice for this blank.

Meaning: 'Highlight' means to make something stand out or to emphasize it, particularly in the context of identifying dangers.

Wrong options:

• instance: The noun 'instance' does not fit grammatically as it does not indicate an action that the system can perform.
• describe: The verb 'describe' does not fit as it does not convey the action of identifying or emphasizing dangers.
• behalf: The noun 'behalf' does not fit as it does not relate to the action of the system in this context.
• exemplifying: The gerund 'exemplifying' does not fit as it does not indicate a direct action that the system can perform, and it does not relate to the context of highlighting dangers.

Correct answer: indicating

Explanation: The word 'indicating' fits grammatically as a present participle that describes the action of showing or pointing out. It aligns with the context of the glasses being used to show points of interest during a guided tour.

Meaning: 'Indicating' means to point out or show something, particularly in the context of highlighting points of interest.

Wrong options:

• instance: The noun 'instance' does not fit grammatically as it does not describe an action related to the glasses.
• describe: The verb 'describe' does not fit as it does not convey the action of showing or pointing out points of interest.
• behalf: The noun 'behalf' does not fit as it does not relate to the action of indicating points of interest.
• highlight: The verb 'highlight' does not fit as it does not serve as a participle describing the action of the glasses.