In plants and animals, carbon cycles through molecular processes that store and release energy in various molecular forms. in these plant and animal molecular processes, carbon is found in
sugar molecules and oxygen molecules.

sugar molecules and water molecules.

carbon dioxide and sugar molecules.

carbon dioxide and oxygen molecules.

carbon dioxide and sugar molecules.

Explanation:

The carbon is found in carbon dioxide whose composition is CO2 (one atom of carbon per two of oxygen) and in the sugar that is a primordial element, composed of carbon, oxygen and hydrogen.

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

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.