Final answer:
In the sentence provided, 'child' is the subject and the verb is 'fights'. The subject of a sentence identifies the person, place, thing, or idea being discussed, while the verb expresses action or state of being.
Step-by-step explanation:
The subject of the sentence 'This sentence's subject is child' is indeed child. Among the provided options - cautious, child, reckless, and fights - the word that represents an action and is therefore the verb is 'fights'. In other contexts, 'child' is the singular noun form, with the plural being children. Remember, the subject of a sentence names a person, place, thing or idea, while the predicate contains the verb, expressing action, occurrence, or a state of being.
Review Questions - Examples
Either my brother or my sisters is/are in charge of washing the dishes tonight.