Asexual reproduction in which a single cell divides into two with no exchange of genetic material reproduction method of bacteria

c

explanation:

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101

garbage disposal because lysosomes dispose of old cell parts like garbage disposals dispose of old food.