Why are floods in urban areas particularly dangerous?
a. city buildings do not allow flood waters to recede
b. flood waters spread pollutants and diseases more rapidly.
c. flood waters permanently damage crop soils.
d. most cities are built in flood zones.

A and C are definitely not your answer.

Soils aren't really located in urban areas.

So I believe your best answer would be B.

Hope I helped. :)

Answer is arabian desert

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