Answer:
¿Qué es/son? = What is it/What are they?
¿Quién eres? = Who are you?
¿De dónde eres/es? = Where are you from/Where is it from
¿Cómo eres/es? = How are you/How is it?
Explanation:
The Spanish verb ser is usually used to describe traits that are permanent. On the other hand, estar is used to refer to conditions that are temporary.
Example: ¿Estas enferma? - Are you sick?
Being sick is a temporary state.
Example: Soy rubio. - I am blonde.
