Aerobic organisms are living beings that require oxygen to survive and grow. They use oxygen in a process called cellular respiration to convert food into energy. This process is essential for their metabolism and helps them perform various life functions. Examples of aerobic organisms include most animals, plants, and many types of bacteria. These organisms thrive in environments where oxygen is available, such as in the atmosphere or water. In contrast, anaerobic organisms can live without oxygen and often inhabit environments where oxygen levels are low.