To help them study more about animals and how they react to one another they divide the world into small parts called an ecosystem. An ecosystem is made up of many kinds of animals and nonliving things like for example producers, consumers and much more. All these animals and nonliving things live in one place. An ecosystem can be larger than a lake and smaller than one little single tree. There are many kinds of ecosystem in the world.
Every country has different kinds of ecosystems like for example forests, wetlands, river, and etc.
All of these ecosyetem have different kinds of animals and nonliving things living in that place. Sometimes the ecosytem have endangered animals in it so that they can be protected from danger. This is how scientist study how one organisms react to another. All living things are connected to one another in an ecosystem.