I think A is the correct answer
Answer:
People are becoming sick from new kinds of illnesses.
Explanation:
<em><u>the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.</u></em>
I would say C. It gives us more adjectives that describe it better than the others.
Hope this helps have a blessed day!