What are the necessary conditions for autotrophic nutrition and what are its by products?

Necessary conditions for autotrophic nutrition:

(i) Presence of chlorophyll in the living cells.
(ii) Supply of water to green parts or cells of the plant either through roots or by surrounding environment.
(iii) Availability of sufficient of sunlight to provide light energy required to carry out photosynthesis.
(iv) Sufficient supply of carbon dioxide which is one of the important component for the formation of carbohydrates during photosynthesis.