Adaptations benefit animals to survive and this may depend on their physical appearance and behavior. For example, whales have characteristics that help them live in water, such as their body shape that allows them to swim and small flippers to help them move quickly through water, while an eagle has wings to fly and fur to hold them. hot, sharp claws for hunting (Kidport, 2012). Therefore, a whale is different in that it lives in water compared to an eagle on land. This reinforces the idea that animals are diverse and that they are grouped in a way suited to their abilities and conditions for survival. Food is also essential for all species, which classifies them into three groups of nutrients they consume, making it easier for scientists to group species. Animals can be carnivorous, allowing them to obtain calories and energy by eating meat, such as wolves. Herbivorous organisms eat plants as a source of energy and nutrients, for example horses. Omnivores are a collective group of animals that receive energy from both plants and animals, for example chickens. Therefore, different living things are exposed to hunting for different types of food (Burchill,