Question

from vapor to liquid
from liquid to vapor
from solid to vapor
a. the formation of clouds
b. transpiration from plant leaves into the air
c. snow evaporating as wind blows across the surface

Explanation:

The formation of clouds is condensation (from vapor to liquid). Transpiration is evaporation (from liquid to vapor) from plant leaves. Snow evaporating is sublimation (from solid to vapor).

Answer:

From vapor to liquid - A. the formation of clouds
From liquid to vapor - B. transpiration from plant leaves into the air
From solid to vapor - C. snow evaporating as wind blows across the surface