How does having designated uses for bodies of water reduce human impact? A) With designated use, waterways are no longer in danger of being polluted.
B) Designated use allows the use of waterways to be limited to ones that best fit the function of the
waterway
C) By having designated uses for waterways, soil erosion can be completely avoided.
D) All of the above
PLS HELP ASAP

How are carbon dioxide emissions affecting the earths natural cycle of temperature change? plz apex

Read the following scenario to answer the following question. over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution

The first signs of cellular differentiation occur in the blastocyst. why is cellular differentiation important for the development of a fully formed human infant?