Which of the following is most likely an indication of a chemical change? O A. Changing colors at a laser show
O B. Steam being. given off when water is boiled
O C. A strong odor at a garbage dump
O D. A loud rush of water at a waterfall
SUBMIT

really dont know just need some points

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).