They classify them from classification.
They consider it's body plan and place
The place an organism fits into its habitat is its niche.
A place where organism spends his/her life is habitat.
A living place where an organism lives is called a habitat.
its egosystem
dead organism
The special and role and place of organism within in its habitat is its niche.
its egosystem
Thousands of chemical reactions take place in an organism.
Habitat
a community.
A habitat