‼️ASAP‼️ PLS HELP + EXPLAIN!!! Thx!
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SUBSTITUTION MUTATION

it would be heredity

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.

answer; lower are;