The engineering design process can be used to develop ways to reduce human impacts on the environment. Why would a community decide to use the engineering design process as they look for a solution for an environmental problem?

Because engineering is meant for environmental problems it is design too look for a solution and fix it

The answer is d if you are on edgenuity. 

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