The quantity of heat from a chemical reaction comes from
a. the breaking and formation of chemical bonds.
b. the presence of oxygen in the reaction.
c. the emission of radiation.
d. the composition of the fuelair mix.
Question 2
The Office of Investigations, Office of Detention and Removal Operations, Federal Protective Service, and Office of Intelligence are the four main branches of and Customs Enforcement.
What will be an ideal response?