What are some relationships of organisms and their enviorment?

Like give some examples like, Fish and their relationships or like some other animals. Do you get the clarification? Thanks please answer quickly as possible!!!What are some relationships of organisms and their enviorment?
the relationsip between animals n thre environment is called ecology,animals get adapted 2 there environment through interaction,the environmental factors include most non living things which are rainfall,temperature e.t.c.they get use 2 it as they experiance the phenomenom every day,fishes get adapted 2 the water body as they live in it n develope certain features 2 help them in it through evolution which include the fins,the streamline body n the gills.What are some relationships of organisms and their enviorment?
shark and remora fish = mutualism

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