Answer: B, hace viento
Explanation: We want to describe the fall weather, and the given options are:
A "esta caliente" or "it is hot"
B "hace viento" or "windy"
C "cae nieve" or "Snow is falling"
D "hace calor" or "is hot"
The one that better describes the wheater in fall would be option B, windy, or "hace viento" in Spanish.