The search for life on other planets started with finding out if _______ was present on its surface.

oxygen

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water

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carbon dioxide

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clouds

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Solution

The correct option is B water
Water is important for survival of life in general.
Water plays an important role in a lot of life processes. Hence, whenever we search for life in other planets, we look at presence of water as a positive indication.

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The search for life on other planets started with finding out if _______ was present on its surface.

The correct option is B waterWater is important for survival of life in general. Water plays an important role in a lot of life processes. Hence, whenever we search for life in other planets, we look at presence of water as a positive indication.

The correct option is B water
Water is important for survival of life in general.
Water plays an important role in a lot of life processes. Hence, whenever we search for life in other planets, we look at presence of water as a positive indication.