Photosynthesis, 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.
Sentence 4
The topic sentence should set up what the paragraph is going to be about. This paragraph is about both heroes of the 1940s and heroes of the present, and sentence four is the only sentence that includes both. It also provides an indication that the paragraph is going to be comparing both types of heroes to each other.
Of authority or an office, or someone holding it) superior to all others.
"a unified force with a supreme commander"
synonyms: highest-ranking, chief, head, top, foremost, principal, superior, premier, first, prime;
