¿Con que organismos inicia el flujo de la materia y con cuales finaliza?

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

im not intirely sure but i think the anwser is d relative humidity