According to Darwin, evolution takes place by a process called
random choice.
True or false

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.

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.