Meaning: 'Tracking' refers to the act of monitoring or observing something over time.

Wrong options:

• administer: The verb 'administer' means to manage or supervise, which does not fit the context of how the watch functions.
• detects: 'Detects' is a verb that implies finding or discovering something, but it does not describe the ongoing action of the watch's operation.
• hoisted: 'Hoisted' is a past participle of 'hoist,' meaning to lift or raise, which is irrelevant to the function of the watch.
• healthy: 'Healthy' is an adjective describing a state of well-being, which does not fit as a verb or noun in this context.
• located: 'Located' is a past participle that describes the position of something, which does not fit as an action related to the watch's function.
• alerts: 'Alerts' is a verb that indicates notifying someone, but it does not describe the action of the watch itself.

Correct answer: detects

Explanation: The word 'detects' is a verb that indicates the action of identifying or discovering a change in health. It fits grammatically as it describes what the watch does when it senses a health change, maintaining the logical flow of the sentence.

Meaning: 'Detects' means to discover or identify the presence of something, in this case, a change in health.

Wrong options:

• administer: 'Administer' does not fit as it implies managing rather than identifying changes in health.
• tracking: 'Tracking' is a gerund that describes monitoring, which does not fit the context of identifying a specific change.
• hoisted: 'Hoisted' is irrelevant as it refers to lifting something, which does not relate to the action of detecting.
• healthy: 'Healthy' is an adjective and does not function as a verb, making it unsuitable in this context.
• located: 'Located' describes a position and does not convey the action of identifying changes in health.
• alerts: 'Alerts' is a verb that means to notify, which does not fit the context of detecting changes.

Correct answer: located

Explanation: The word 'located' is a past participle that describes the position of the touchscreen hub. It fits grammatically as it provides information about where the hub is situated, maintaining clarity in the sentence structure.

Meaning: 'Located' means to be situated or positioned in a specific place.

Wrong options:

• administer: 'Administer' does not fit as it refers to managing rather than describing a position.
• detects: 'Detects' is a verb that does not describe the position of the hub, making it unsuitable here.
• hoisted: 'Hoisted' is irrelevant as it refers to lifting, which does not relate to the location of the hub.
• healthy: 'Healthy' is an adjective that does not describe a position and is not appropriate in this context.
• tracking: 'Tracking' refers to monitoring and does not convey the idea of location.
• alerts: 'Alerts' is a verb that indicates notifying someone, which does not fit the context of describing a position.

Correct answer: alerts

Explanation: The word 'alerts' is a verb that indicates the action of notifying or warning someone. It fits grammatically as it describes what the hub does in response to detecting a health change, contributing to the logical flow of the sentence.

Meaning: 'Alerts' means to notify someone about something important or urgent, in this case, health issues.

Wrong options:

• administer: 'Administer' does not fit as it implies managing rather than notifying contacts.
• detects: 'Detects' is a verb that describes identifying changes, which does not fit the action of notifying.
• hoisted: 'Hoisted' is irrelevant as it refers to lifting something, which does not relate to alerting contacts.
• healthy: 'Healthy' is an adjective and does not function as a verb, making it unsuitable in this context.
• located: 'Located' describes a position and does not convey the action of alerting.
• tracking: 'Tracking' refers to monitoring and does not fit the context of notifying contacts.