How does the sun provide us with the energy we need to run our bodies?

The sun radiates a lot of things we need like vitamin D and heat. It also is the energy source of organisms that survive off of photosynthesis, like plants, which we or other consumers eat.

It's like this:

Sun--->Producers (Plants and Protists) - - - > Consumers (animals and humans) - - - > Decomposers (mostly bugs, bacteria, and fungi)