Plate Tectonics is the ___ of the E arth’s rigid lithospheric plates as  they slide slowly over the astheno sphere.  The word has 11 letters

The second letter is n

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 decreased soil salinity;

The answer for your problem would be a. 7