Answer:
more nitrogen gas became present in the atmosphere
Well A and d are obviously wrong and based on context clues I’d go with B
Rayograph is a process invented by Man Ray. He lived in NY during the early 1900s. He helped form the Dada Movement, which influenced later art styles, including Surrealism.
Surrealism is a form of art, influenced by the Dada movement, that focuses mainly on fantastic or dream-like imagery.
I would say adjective clause
Light sources can be coming into any angle of the piece of work. it can make the contrast different completely, and make the piece darker or lighter.
