Which living beings are known to create their own light?

• A. Goldfish and cats
• B. Jellyfish and mushrooms
• C. Trees and bushes
• D. Birds and insects

Answer: (B)

B is the correct answer because jellyfish and certain mushrooms are bioluminescent organisms that can produce their own light through a chemical reaction within their bodies. Jellyfish have specialized cells that contain substances called luciferins and enzymes called luciferases, which facilitate the light-emitting process when they combine in the presence of oxygen.

Similarly, certain species of mushrooms, like the bioluminescent fungus, have the ability to emit light as a natural part of their life cycle, often to attract insects that can help with spore dispersal. This type of bioluminescence is found in various organisms in ecosystems and serves specific functions, such as attracting mates or deterring predators.

Other living beings, such as the options involving goldfish and cats, trees and bushes, or birds and insects, do not possess the same bioluminescent properties and thus do not create their own light.