A geologist uses relative dating methods to guess that a rock is between 1 million and 5 million years old. What is one radioactive isotope the
geologist can use to learn the exact age of the rock? Explain your answer.

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

atp is used for energy.

not only is it colder, it also becomes darker, less salty, and more dense.