What are three necessary conditions for evolution by natural selection? Explain with evidence of these necessary conditions is satisfied by the black vs. speckled forms of the peppered moth

Reproduction, heredity, variation in physical characteristics and variation in number of offspring per individual.

Explanation:

The heredity in the speckled forms of the moths were the most common form as they camouflaged much easier, while the black moths would be eaten off by predators as they could not camouflage as well. With the industrial revolution the coal and other things made many trees in the forest black, because of the physical variation the black moths now blended in while the speckle moths couldn't and the roles were reversed.

answer; ////increased water pollution; ///////////////////////

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave