This is an example of a(n)

A. Aquatic Biome
B. Terrestrial Biome
C. Aquatic Biosphere
D. Terrestrial Biosphere

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

i believe the answer is 5,000