C. The presence of predators could cause natural selection because it would mean survival of the fittest.
Agriculture= Crops that are disease resistant, stay fresh longer, insect resistant and higher number of crops
D. They transport oxygen to all the cells of the body
<span>Photosynthesis is important to living organisms because it is the foundation of most food chains. Photosynthesis is the process in which plants use the energy of Sunlight to convert carbon dioxide and water into sugar and oxygen. In food chains, plants are producers because they produce their own food so they are the foundation of most food chains. Since plants are the biggest group of organisms that perform photosynthesis, photosynthesis is important to living organisms because it is the foundation of most food chains.</span>
