What are the photoautotrophs?

Photoautotrophs are organisms that carry out photosynthesis. Using energy from sunlight, carbon dioxide and water are converted into organic materials to be used in cellular functions such as biosynthesis and respiration

Explanation:

the example of photoautrophs are

Examples of phototrophs/photoautotroph include:

Higher plants (maize plant, trees, grass etc)

Euglena.

Algae (Green algae etc)

Bacteria (e.g. Cyanobacteria)

Algae are photoautotrophs found in most ecosystems, but they generally are more important in water-based, or aquatic, ecosystems. Like plants, algae are eukaryotes that contain chloroplasts for photosynthesi

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.

i am going to guess that it is co2.