The level of productivity in oceans can be explained by the fact that more sunlight is available to organisms in oceans
O growth in oceans is not limited by nutrient availability
the volume of the global ocean is enormous
there are fewer primary consumers in oceans
O oceans are home to whales, which are large animals

your spelling is a little off : ]

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation:

d. planting trees

the trees take in carbon to make oxygen.