Which of the following types of organism perform photosynthesis

Most plants, most algae, and cyanobacteria perform photosynthesis; such organisms are called photoautotrophs. Photosynthesis is largely responsible for producing and maintaining the oxygen content of the Earth's atmosphere, and supplies all of the organic compounds and most of the energy necessary for life on Earth.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

the answer would be d : p