Which of the following changes to waterways is only the result of human activity?
a. erosion
b. temperature fluctuations
c. flooding
d. chemical pollution

The correct answer for the question that is being presented above is this one: "d. chemical pollution." Chemical pollution changes to waterways is only the result of human activity. It is also considered a human activity that cause a lot of harm to the environment.

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen

Answerfur trade;