Is Manuel the one talking? (I) If so, it would be o.
Is somebody asking Manuel which ending he would use? (You) if so, it would be as.
This is the Spanish side of Brainly
QUESTION 1: What is the affirmative tú command of poner?
Answer for Blank 1: Pon
QUESTION 2: What is the affirmative tú command of decir?
Answer for Blank 2: Di