The feeding relationships among the species in a community determine the community's: a. trophic structure. b. ecological niche. c. species richness. d. secondary succession.

Trophic structure.

Explanation:

The ecology includes all the living and non living components of an area. The relationship between the organisms in terms of food, energy and numbers can be indicated by the different pyramids and food chain.

The food chain determines the sequential trophics level of the ecosystem. The organisms eat other organisms and may itself get eaten by other organism is explained by the different trophic levels that includes the different food chain and food web.

Thus, the correct answer is option (a).

the endomembrane system is a series of compartments that work together to package, label, and ship proteins and molecules. in your cells, the endomembrane system is made up of both the endoplasmic reticulum and the golgi apparatus. these compartments are folds of membranes that form tubes and sacs in your cells.

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.