Use the verb “to be.”
Write more lively sentences.
Write longer sentences.
Emphasize the subject of the sentence being acted on

Answer:- 3. Write longer sentences.

Writing in the active voice will allow the person to write more lively sentences.

Further Explanation;

Active voice

Active voice defines a sentence where the subject completes the action specified by the verb.
In simpler words, the subject or the noun of a sentence performs the action on an object.
This defines a sentence where the subject completes the action stated by the verb.
Active voice enhances impact in writing and provides live to sentences. Active voices highlight the doer of the action.
Instances of sentences in active voice