Question

The highest amount of ${CO_2}$ is evolved from
A. Oceans
B. Rivers
C. Ponds
D. Forests

Answer 1

Hint: The world is made up with $30$ percent land and $70$ percent water. Among the water bodies, the largest water containing body is the source of the highest amount of ${CO_2}$.

Complete answer:
The water bodies that are present on the Earth’s surface include oceans, rivers, polar ice caps, etc.
The oceans are the largest water source that contains rocks, minerals, salts, etc.
A huge number of phytoplankton are present in seawater.
These phytoplanktons use air carbon dioxide and solar energy to produce food that is glucose – which is a carbon source.
Again, sea animals produce carbon dioxide during their respiration.
Thus, Carbon dioxide is an important trace gas in the environment.
It is an essential part of the carbon cycle.
A biogeochemical cycle in which carbon is exchanged between the Earth's oceans, soil, rocks, and the biosphere.
All organisms present on the Earth depend on carbohydrates that are derived from photosynthesis as their primary source of energy and carbon compounds.

So, the correct answer is option A. oceans.

Note: Rivers, ponds occupy a very small amount of area on earth’s surface so it cannot be the answer. Besides phytoplanktons are present in the river and ponds also and contribute similarly to the carbon cycle. The forests also occupy a small amount of Earth’s surface. The trees produce carbohydrates containing food and during respiration, they release carbon dioxide. The woods of the trees are also the source of the carbon cycle. Thus, the forests also take a vital role in the carbon cycle.