What are three main elements that make up living things

Water, sunlight and oxygen

Explanation:

Water helps the in many ways and is one of the elements of making living things. For one example water helps plants grow so that we can buy it and eat it and the farm can make a profit off of it, and be able to get more seeds to keep growing the produtcs. And animals needs the water to eat as well. With out water we are nothing.

Sunlight- Sunlight is a second major factor with living things. Sunlight helps a ton with making stuff grow tall and strong. Sunlight helps us also for tans and to make us warmn.

Oxygen is the last major factor with this. No oxygen no trees, no humans. The trees need the sun and water so that we as humans can breath.