What causes the salinity of ocean water to decrease? a. the melting of icebergs b. the evaporation of ocean water c. the erosion of rocks and minerals d. the warming of ocean water the only logical answers i see here are a or b, but i'm not sure which one to choose.

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.

"a.) well–developed vascular system."