Human geographer would most likely study . a.
changes in the size of the Antarctic icecaps
b.
the housing styles of the Baka people of the Congo
c.
the landforms of the American Southwest
d.
earthquake patterns in the South Pacific

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

Answer( solar wind );