Question

1. a process in which an event acts as both an input and output of the same system is called a(n) a. feedback loop. b. earth system. c. photosynthesis. d. lithosphere.

Explanation:

A feedback loop is a process where the output of a system can influence its input, effectively acting as both input and output. An Earth system refers to the sum of Earth's components like atmosphere, hydrosphere etc. Photosynthesis is the process by which plants convert light energy into chemical energy. The lithosphere is the rigid outer part of the Earth.

Answer:

A. feedback loop