Answer:
Yo escribí tres composiciones ayer.
Step-by-step explanation:
The correct answer is: Yo escribí tres composiciones ayer. The translation in English is "I wrote three compositions yesterday". The verb escribir means to write, and "escribí" is the past tense, first person singular. In Spanish verbs conjugations change according to the person. That's why it's important to pay attention to the person who's taking the action. In this case it's "yo", which means "me".