The gas absorbed by ocean water which can moderate a potential greenhouse effect is:
o2
co2
he2
n2

The gas absorbed by ocean water which can moderate a potential greenhouse effect is CO2 (Carbon Dioxide). 

Answer;

Carbon dioxide

The gas absorbed by ocean water which can moderate a potential greenhouse effect is carbon dioxide.

Explanation;Greenhouse effect is is a process that warms the Earth's surface. This is as a result of radiation and absorption of sun's energy by greenhouse gases. The ocean decrease the rate of accumulation of carbon dioxide in the atmosphere by absorbing carbon dioxide gas which is a green house gas. Oceans absorbs carbon dioxide from the atmosphere where the air meets the water. The turbulence and waves caused by wind makes water to absorb the carbon dioxide.

In meteorology, a  cloud  is an aerosol consisting of a visible mass of minute liquid droplets, frozen crystals, or other particles suspended in the atmosphere of a planetary body. nephology is the science of  clouds, which is undertaken in the  cloud  physics branch of meteorology.cirrus clouds  usually describe clouds high in the atmosphere that can include wispy clouds, typically with ice crystals. variations include cirrus, cirrocumulus and cirrostratus as defined by the cloud's position in the atmosphere.layered stratus clouds  have both flat tops and bases, and can appear as if they take up the whole sky, stretching from horizon to horizon. other combinations and variations include stratus, stratocumulus, nimbostratus and altostratus.cumulus clouds  often pile up in multiple layers of the atmosphere, representing clouds that develop vertically. cumulus clouds often look like pillars with anvil-type tops or columns of clouds stacked vertically. variations include cumulus, cumulus-congestus, cumulonimbus and altocumulus.

Outermost (valence) electrons