Respuesta :
I would say B. the stars
This is because you don't see stars move. For example, when you look at the moon, do you see the stars move while the moon sits in place? No right. So, your answer would be B. Hope this helps!
Question
Planets appear to move in the sky against the backdrop of the ____ . other planets B. the stars C. the sun D. the moon
Answer:
The stars
Hope this helps!