Which explains why a fallen, rotting tree is considered a biotic factor and not an abiotic factor? ("living things and the environment")

It was once alive.

Explanation:

Biotic factors are defined as the part of ecosystem which is alive, for example: birds, trees or plants, and humans and abiotic factors are the part of ecosystem which are not alive, for example: stone, rivers, and mountains.

A fallen, rotting tree is considered a biotic factor because it was once alive and was not dead from the beginning. Whereas abiotic factors are dead from the beginning and never lived.

Hence, the correct answer is "It was once alive."

mali had been a state inside of the ghanaian empire. after ghana fell because of invading forces and internal disputes, mali rose to greatness under the leadership of a legendary king named sundiata, the "lion king." the songhai empire, already weakened by internal political struggles, went into decline.

chronological thinking is an indispensable tool to structure a historical narrative and to give meaning to a sequence of events. the final section presents the results of a survey to test the chronological thinking of lower secondary school students carried out by the educational research institute.