Animals that roam around on land like tigers, have strong muscular legs that help them in running away from predators or chasing their prey.
Birds like storks and cranes have hollow bones that are light in weight which help them fly in the air with ease.
Aquatic animals that fishes have streamlined bodies which help them swim underwater with less friction.
Some land animals like porcupines and aquatic animals like puffer fish and stingray, have sharp spines that they use in protecting themselves from predators.