Which of the following is major function of carbohydrates? I. Structural framework II. Storage III. Energy production
A. I only
B. II only
C. III only
D. I and III only

Abiotic resources are usually obtained from the lithosphere, atmosphere, and hydrosphere. Examples of abiotic factors are water, air, soil, sunlight, and minerals. Biotic factors are living or once-living organisms in the ecosystem. These are obtained from the biosphere and are capable of reproduction.

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