Question

which of these geological features is commonly associated with divergent boundaries?
rift valleys
mountains
sandstone

Explanation:

Divergent boundaries occur where tectonic plates move apart. As the plates separate, magma rises to fill the gap. In continental settings, this stretching and thinning of the crust can lead to the formation of rift valleys. Mountains are often associated with convergent boundaries (where plates collide) or volcanic activity in other settings. Sandstone is a sedimentary rock and its formation is not directly tied to divergent boundary geological features.

Answer:

rift valleys