The answer is buscas, because the question is referring directly to someone.
Colegio, not sure what options there are but school seems it would fit best.
Depends on what kind of spanish this is but
A: his car
B:your dog
C:our task
D:my books
E:your apples
but i believe it’s c i’m sorry if it’s wrong
La primera: es vivienda
Segunda: plancha la ropa
Tercera: sacude el polvo
Cuarta: la despensa
Quinta: el balcón