Identify the italicized word or phrase.

She was busily planning a party.

O participle

O infinitive

Overb phrase

The first one is the answer

Participle is the correct answer.

Explanation:

A participle is a word formed by a verb and used as noun or as an adjective; they are also used to make compound verb forms. In this case, the participle is formed with the verb + ing as in planning.

An infinitive is the basic form of a verb. It can be identified because it uses "to" before the verb.

A verb phrase contains a main verb or a main verb plus a modal auxiliary or any other auxiliary.