Life forms are special because they are able to interact with their environment in ways that non-living things can't. Life forms are self-regulating, which means they can sense and respond to changes in their environment—such as food availability, temperature, and sunlight—to optimize their chances of survival. Through processes such as respiration and photosynthesis, life forms obtain energy from their environments so that they can grow, reproduce, and maintain a stable internal environment. Life forms also possess unique features known as adaptations that enable them to survive in their habitats. These adaptations can be physical, such as a shape, size, and color, or behavioral, such as a migratory path or defense strategy. For example, some desert plants can survive for several months without water, due to their specialized adaptations for moisture retention. Additionally, some animals have the ability to migrate, which helps them to find food and other resources in different environments. Finally, life forms are amazing because they can interact with one another. For example, most plants rely on pollinators, such as bees and butterflies, to help them reproduce. Similarly, animals in a food chain are dependent on each other to survive. Plant-eating animals provide food for larger predators, while some bacteria and fungi provide essential nutrients to plant roots, allowing them to grow and spread. Through these relationships, life forms have the ability to continually shape and interact with their environments.