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A scavenger is an animal or a person that finds and collects things that others have thrown away or left behind. In nature, it refers to animals that eat dead plants or other dead animals to survive.

Migration is the movement of people or animals from one place to another to live or find food. It can happen every year with the seasons or be a permanent move to a new country.

Hibernation is a long, deep sleep that some animals take during the winter. It helps them save energy and survive when there is very little food available.

Camouflage is a way to hide by looking like the things around you. It helps animals and people stay safe by blending into the background so they are hard to see.

A stream is a small, narrow flow of water that moves naturally along a fixed path. It is smaller than a river and can usually be found in forests or parks.

A pond is a small area of still water that is smaller than a lake. It can be found naturally in the wild or built in a park or garden.

A swamp is a low area of land that is always very wet or covered with water. It usually has many trees and plants growing in it and is often home to animals like frogs and alligators.

A waterfall is a place where a river or stream flows over a high, steep cliff or rock. It is a beautiful natural feature often found in mountainous areas where water drops vertically.

Rapids are parts of a river where the water flows very fast over rocks. They look white and bubbly and can be dangerous for boats.

A delta is a low, flat area of land where a river divides into several smaller rivers before flowing into the sea. It is often shaped like a triangle and is formed by sand and soil left by the water.