The main branch of science that studies living things is biology. Biology encompasses the exploration of life forms, their organization, interactions, development, and evolution. This field includes various sub-disciplines, such as microbiology, botany, zoology, and ecology, which investigate different aspects of living organisms, from cellular processes to ecosystem dynamics. Biologists study the structure, function, growth, and adaptability of organisms, contributing valuable knowledge to medicine, environmental conservation, and genetics. Understanding biological principles is essential for addressing issues such as health care, biodiversity loss, and climate change, making biology crucial in today's world.