Evaluate the validity of the following
statement: the universe is structured by
gravity found in clusters of interacting stars.
support your answer with information from
this lesson?

The correct answer would be lost aquila

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

Economy is the answer