Hello!

The subject of this sentence is "Yo" (I), so we must use the first-person singular conjugation.
Thus, the correct conjugation ends with an "o", or "Pruebo". Choice A is the correct answer.
Answer:
1. Los padres.
2. Las personalidades (not so sure about this one)
3. Las hermanas
4. Los lápices
5. Los relojes (not so sure about this either)
6. Los peces (not sure at all)
Explanation:
The image is my explanation
Donde vas a ir? Where are you going?
Voy a la casa. I'm going home.
Donde esta tu casa? Where is your house?
Esta cinco minutos de aqui. It's five minutes from here.
Donde vas a estar el Martes? Where are you going to be on Tuesday?
En la biblioteca. In the library.
Quieres ir a la escuela junto el miercoles? Do you want to go to school together on Wednesday?
Si. Yes.
UNA casa GRANDE so "una grande" is the answer