Which term denotes the study of life?

The study of life is encompassed by the term biology, which comes from the Greek words "bios," meaning life, and "logos," meaning study. This field of science focuses on understanding living organisms, their interactions with the environment, their structures, functions, development, and evolution. Biology covers various sub-disciplines, including genetics, ecology, and microbiology, among others, which all delve into different aspects of life and living processes.

Cytology, while a branch of biology, specifically focuses on the structure and function of cells. Anatomy pertains to the physical structure of organisms and their parts, generally concentrating on the system-level organization. Psychology, on the other hand, is the study of behavior and mental processes, which is more concerned with the mental and emotional aspects of living beings rather than the general study of life itself. Thus, biology is the most encompassing term for the study of life.