The correct answer is C. Perform certain physiological functions.
Step-by-step explanation:
An entity is defined as a living organism only when it performs certain physiological functions or processes these include growing, obtaining energy or nutrients, reproducing, adapting, among others. These processes are essential because they allow a unicellular or multicellular living entity to live as, without this, the organism would die. Similarly, non-living elements such as rocks are classified as inanimate or non-alive as they are not composed of cells and doe not perform physiological functions. According to this, in order for a living organism to sustain its life, it must be able to perform certain physiological functions.