Suppose a population of 8 wolves has produced 20 young in a year. if 7 wolves have died, how many wolves are in the population now? (assume no wolves have moved into or out of the population for other reasons.)

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