La pelota. It is the only one that is not used to play with a ball. It itself is the ball.
I can guarantee you this is the answer.
Answer:
enciendas
Explanation:
porque el quiere que no encienda en ese momento el Horno
Comem(os), Jugam(os), Peliam(os) Comenzam(os). In other words pronouns that end in (os).