In the scheme of life, soil is an essential resource of life, as it plays the following roles.
(a) It is a reservoir of carbon.
(b) It is the medium for growth of food and energy for the animal world.
(c) It provides oxygen to the biotic community.
(d) It is a natural reservoir for the huge amont of water.
Select the correct answer from the above:
(a), (b) and (d)
To determine the correct roles that soil plays in the life scheme, we need to analyze each option provided in the question:
- Soil as a Reservoir of Carbon (Option a):
- Soil contains a significant amount of organic carbon, which is a critical component of the global carbon cycle. This role makes it a valuable reservoir of carbon, influencing both carbon storage and the release of carbon dioxide into the atmosphere.
- Soil as a Medium for Growth (Option b):
- Soil provides nutrients and a physical support system for plants, which are primary producers in ecosystems. This makes soil essential for the growth of food crops and for providing energy indirectly to animals in the food chain.
- Soil Providing Oxygen (Option c):
- This statement is misleading as soil itself does not provide oxygen. Plants produce oxygen through photosynthesis, which occurs above ground. However, soil supports plant life, which then contributes to oxygen production, but indirectly.
- Soil as a Natural Reservoir for Water (Option d):
- Soil has the capability to store large amounts of water, which is essential for plant growth and also influences water supply and quality in ecosystems and human use.
Based on the analysis above, the accurate roles played by soil are:
- (a) It is a reservoir of carbon.
- (b) It is the medium for growth of food and energy for the animal world.
- (d) It is a natural reservoir for a huge amount of water.
Therefore, the correct option is (a), (b), and (d).
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