How does competition affects behavior of species

The way organisms compete with each other determines species distributions, population dynamics, community structure, food webs, and social dominance hierarchies. ... These stressors affect the way that organisms compete with each other and their ability to survive and co-exist.

Explanation:

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.

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.