Chemistry is the branch of science that studies the composition, structure, properties, and changes of matter. It focuses on how different substances interact, combine, and react with each other. This field is essential for understanding everything from the air we breathe to the food we eat, as it explains the chemical processes that occur in our environment. Biology, on the other hand, is the study of living organisms and their interactions with each other and their environments. It encompasses various subfields, including genetics, ecology, and microbiology. Biology helps us understand the complexities of life, including how organisms grow, reproduce, and evolve over time.