How do scientists use the kinetic theory of matter?

they use it to explain the color of matter.
they use it to explain the shape of matter.
they use it to study the effect of energy on matter.
they use it to study the effect of time on matter.

answer:

they use it to study the effect of energy on matter.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.