20. What similarities can be found among the different types of wild goats? O They are able to consume herbivores.
They are sources of energy for large predators.
They are all found above 15,000-foot elevations.
They are large herbivores.
I will mark

d

explanation:

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.