(Is doing )is the answer and is present participle because, it's an ongoing action that is been done
Answer:
The answer is "is doing".
Explanation:
The command is for us to use the present participle of the verb. The present participle is a verb form in which we add -ing to the verb to represent an action that is in progress. Thus, the only correct option is the last one, "is doing":
The present participle can also be used as a noun, an infinitive, or even an adjective. For example: