Endergonic reactions
a. release energy.
b. are catabolic reactions
c. are anabolic reactions
d. are hydrolysis reactions
e. all of the choices are correct.

c. are anabolic reactions

Explanation:

Endergonic reactions require the absorption or use of energy to occur usually in the form of ATP. Anabolic reactions generate molecules from smaller units and require energy to do so.

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

it creates acid rain