The ozone layer
A. is found in upper part of the thermo sphere
B. is made of charged ions and free electrons
C. absorb much of the sun's harmful UV radiation
D. Keeps the stratosphere very cold

Migration is a. the movement of organisms from a native location to a foreign location b. the movement of organisms from a foreign location to a native location the movement of organisms from their water supply to their food supply d. the seasonal movement of organisms between locations c. select the best answer from above