It is the unit simples units of living matter that can maintain life and reproduce themselves. A. Organs B. Tissues A C. Cells D. System

C. Cells<br /><br />Cells are considered the basic, simplest units of life. They are the smallest entities that exhibit all the characteristics of living things, including metabolism, growth, reproduction, and response to stimuli. Tissues, organs, and systems are all made up of cells.<br />