Which describes the boundary where earthquake activity occurs along rift valleys?

Divergent boundaries – where two plates are moving apart. Divergent boundaries within continents initially produce rifts, which produce rift valleys. The most active divergent plate boundaries are between oceanic plates and are often called mid-oceanic ridges.

Explanation:

Yes they do

Explanation:

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

b

explanation:

mitosis