Low-frequency red light is used in dark rooms because it does not expose the film. this is because the red light has a low a) amplitude. b) energy. c) intensity. d) wavelength.

The answer is B -energy

Explanation:

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".