An ecosystem is a community of living things (plants, animals, and microorganisms) interacting with each other and their environment.

A food chain shows how energy and nutrients flow from one organism to another in an ecosystem.

Herbivores.

Carnivores.

Hibernation is a period of inactivity and metabolic depression in animals during winter.

Migration is the seasonal movement of animals from one region to another for food or breeding.

Plants produce energy through photosynthesis and provide food and oxygen for other living things.