Final answer:
Biology is the study of living organisms and their interactions with the environment. It involves understanding the key properties of life and the hierarchical organization of living things. Biologists also explore evolutionary relationships among organisms.
Step-by-step explanation:
Biology is the study of living organisms and their interactions with one another and their environment. It encompasses the study of everything from cells to ecosystems. The basic principles of biology include key properties shared by all living organisms, such as order, sensitivity, reproduction, growth and development, regulation, homeostasis, and energy processing. Biologists also examine the hierarchical organization of life, from atoms to the biosphere, and study the evolutionary relationships among organisms.