Which of the following are examples of natural sources of light?

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Glow worms

Sun

Fireflies

All of the above

answer is D.

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Detailed Solution

Sun, fireflies, and glow worms are examples of natural sources of light.
For a natural light source, the light produced on its own by a natural process without external energy is used to produce light. Some other examples of natural sources of light are stars like the sun. In the middle of the sun, a large amount of heat is produced due to reactions. This is a natural phenomenon occurring in the sun responsible for producing light. Some other examples are fireflies, glow worms, etc. Some of these insects produce light on their own due to some biological process. So, these objects produce light on their own and come under the category of natural light sources.

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