What is the source of energy for all ecosystems on Earth, except for the deep sea hydro:thermal ecosystem?

What is the source of energy for all ecosystems on Earth, except for the deep sea hydro:thermal ecosystem?
  1. Sun
  2. Hydro:thermal energy
  3. Nuclear energy
  4. Fossil fuels

Solution

Except for the deep sea hydro:thermal ecosystem, sun is the only source of energy for all ecosystems on Earth.

Asked in: NCERT

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