Which organisms create all usable food energy on earth? consumers decomposers heterotrophs producers

The organisms that create all the usable food energy on Earth are called the producers. These organisms are able to produce food through the different resources such as the energy from the Sun, the carbon dioxide, and water and minerals that they absorb from the soil. 

Im assuming this is a multiple choice answer what is the answers to chooce from?

Molecules called lipids have long hydrocarbon chains that determine the way they act. they can be fats, oils, or hormones, and even exist in our cell membranes