I'm not sure that this is 400 words but this is what I came up with.
Answer:C. Silver Halide Crystals
Explanation:
Silver Halide is light sensitive, therefore exposing it to light will cause a chemical reaction that darkens a film to produce an image.
Adolescents differ from adults in the way they behave, solve problems, and make decisions. Other changes in the brain during adolescence include a rapid increase in the connections between the brain cells and making the brain pathways more effective.
Answer:
Sleepytime medican and her mother
Explanation:
