#1A coiled spring a a raised weight a fist before it is thrown
#2 potential is Gravity pulling on a rock to make it fall and Kinetic is movement, someone running
#3 that is Potential energy.
Reproductive isolation must happen
Answer:
id say b. cells are the basic unit stricture and function of all living things.
Explanation:
the kangaroo uses his muscles and his muscles are made of cells
Carbón biomolcule i think