What is needed for active transport

Options :
  1. evolution of heat
  2. availability of light and heat
  3. presence of light
  4. availability of energy

Answer and Explanation :-

Answer: Option 4


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She smiled and said with an ecstatic air: "It shines like a little diamond","What does?""This moment. It is round, it hangs in empty space like a little diamond I am eternal.
-Jean-Paul Sartre The Age of Reason