A retreating glacier forms an are of rocky material. When primary
succession occurs, which organisms will help create the soil by breaking
down bare rock?*
A Insects
B Lichens
C Grasses
D Deciduous trees

Explanation:

As ecosystem moves through the stage of succession the population of organisms in them change which of the following describes the stage of succession likely to have the most biodiversity

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.

i believe it's c. the trait for large beaks will be passed on to future generations through natural selection.

since eventually smaller beaks would have to find another source of food or even eventually just die out from the lack of food.