Which of the following is not a characteristic of a least-developed economy? A.
most workers are in the tertiary sector
B.
a very low GDP per capita
C.
a lack of basic resources
D.
a high level of poverty

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

The name may be in importnce  to them