Question

establishment and development of an ecosystem in an area that was previously uninhabited
secondary succession
energy pyramid
primary succession
omnivore

Explanation:

Primary succession occurs in an area that was previously uninhabited, where new soil is formed and pioneer species start the process of ecosystem - building. Secondary succession occurs in an area where a pre - existing community has been disturbed. An energy pyramid represents the flow of energy through trophic levels. An omnivore is an organism that eats both plants and animals.

Answer:

Primary succession