We are going to need the words in order to help you.
The answer would be "hace". This is because "hace" refers to the usted form. The usted form is used in situations where you are using he, she or it.
Answer:
Explanation:
1. sara es la mejor estudiante de la clase - Sara is the best student in the class
2. Le pedí ayuda a mi mamá - I asked my mom for help
3. mis padres querían visitar anoche - My parents wanted to visit last night