JKSSB Mock Tests

What is the primary source of energy for most ecosystems on Earth?

A. Tidal energy
B. Wind
C. Geothermal heat
D. Sunlight
Answer: Option D
Solution (By JKSSB Mock Tests Team)
Abundant sunlight directly fuels massive ongoing photosynthesis in widespread autotrophic organisms like green plants and marine algae, heavily establishing the rock-solid foundational base of usable energy that ultimately sustains nearly all global food webs.
This Question Belongs to: General science Biology set 1
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