Because it is to their ecosystem that animals (plants and other organisms too) have adapted through evolution.
all animals balace out the food chain or a specific ecosystem
What are the long term effects [of what, exactly?] on the ecosystem and animals? Please be more specific.
Yes. An ecosystem consists of animals, plants, and so forth. Without any of these components then there wouldn't be such thing as an ecosystem.
some animals might not get what they need
So the animals that eat plants can eat plants and won't run out.
Animals find shelter in the ecosystem. The animals are predators. They use the resources they have.
its the habitat were animals live
Ecosystem is a habitat where as community is a bunch of animals
There is only one ecosystem the comprise with animals. The only ecosystem that comprises animal is nitrogen.
you need to be more specific
All the populations in an ecosystem refer to the various species of organisms living and interacting within a specific environment. These populations may include plants, animals, fungi, and microorganisms that are interdependent and contribute to the overall functioning of the ecosystem. Changes in one population can have ripple effects on other populations within the ecosystem.
They make their own food so that they can be provided for other animals to eat.