Where does the water in streams and rivers originate?
a. precipitation
b. runoff
c. ice and snowpacks
d. all of the abovemost of the water you see flowing in rivers comes from precipitation runoff from the land surface alongside the river.

The believe that the best answer among the choices provided by the question is d. all of the aboveMost of the water you see flowing in rivers comes from precipitation RUNOFF from the land surface alongside the river.

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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

2cool and cold temperature unless its an ever green tree