Carbon is incorporated into life-forms through photosynthesis.
Photosynthesis is the process used by green plants and a few organisms that use sunlight, carbon dioxide and water to prepare their food. Photosynthesis takes place in chloroplasts, which are special organelles. Since this organelle has its own DNA and genes, it can produce its own proteins. The stroma, fluid, and grana make up chloroplasts. Chlorophyll a, chlorophyll b, and carotenoids are three essential pigments that absorb light energy in the chloroplast.