DNA is found within the inside the nucleus of the cell.

yes it is weird but true

the answer is :

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

because it travels in smaller waves then all other colors, causing it to be the most visible color