Please solve the answer the following question

Dear student,
Please find below the answer:

1. Sun gives us energy in the form of heat and light. This heat and light are used by all living organisms to live on earth. Also, plants prepare food with the help of light energy from the sun that is used by other animals to survive.

2. The terrestrial planets are Mercury, Venus, earth and mars. They are called so because they are made up of silicate rocks. 

3. Conditions necessary for the existence of life on any planet are- water, air, essential nutrients and moderate temperature.

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Hope this clears your doubt.

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