Why are scientists so much interested in 'Europa' - the fourth largest moon of the planet Jupiter?

Options :
  1. It is believed to be the last remain of a planet having collided with Jupiter.
  2. Its atmosphere is very rich in oxygen.
  3. Rocks covering its surface might date from the beginning of the Solar System.
  4. There is a remote possibility that its ice-covered oceans might harbour life.

Answer and Explanation :-

Answer: Option 4


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Because these fools always look up for power. People above you, they never want to share power with you. Why you look to them? They give you nothing. People below you, you give them hope, you give them respect, they give you power, cause they don't think they have any, so they don't mind giving it up.
-Orson Scott Card Ender's Shadow