Which graph best represents directional selection? Graph A

Graph B

Graph C

And I think the answer is Graph B

answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

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ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called