How is a cold environment interdependent?

Interdependence is essential for survival in cold environments. Examples of interdependence in cold environments include:

complex food webs are good examples of interdependence in cold environments.
indigenous people rely on whales and seals for clothing, food and heating. Fish are a staple part of the diet of indigenous people.
plants form dense cushions on the ground to protect them from wind and retain moisture and heat.
moss is used for shelter and to provide warmth by Arctic birds.