Answer: Alto
He is a boy so it ends with O
I'm assuming you want to know if they're worded correctly, so:
1. Correct
2. Correct
3. Mi animal favorito de (la) granja es la vaca porque me encanta la leche.
4. Correct
Answer: para; hasta
Explanation:
Para=stop
He stops the car on the stop sign
Hasta=until
He walks until he arrives at his location which was his office