Which are required for natural selection to occur? inheritance, isolation, adaptation
variation, overpopulation, adaptation
isolation, overpopulation, speciation
variation, inheritance, speciation

B

Explanation:

Natural selection is a mechanism of evolution which was given by Charles Darwin. According to natural selection, individuals with heritable traits which favor their reproductive success as well as survival are selected by nature.

For natural selection to take place, there should be variability as well as higher reproductive success . Eventually natural selection causes individuals to become adapted to their environment (i copied the answer from someone else but here you go so you don't have to search for them)

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.