An example of a natural source of light energy is

Step 1: Analyze the question The question asks for a natural source of light energy. Two ideas matter here: the source must be natural (not man-made) and it must give out light.

Step 2: Explain the concept Energy sources are either natural or artificial:

• Natural sources exist in nature without human production. Examples are the sun, stars, and lightning.
• Artificial sources are made or processed by humans. Examples are electric bulbs, candles, and torches.

In Biology, the sun is the primary natural source of light energy. Green plants trap this light during photosynthesis and turn it into chemical energy stored in food.

Step 3: Evaluate each option

• A. Electricity: It is a form of energy that is generated, and it is not light itself. It can power a bulb, but it is not a natural source of light.
• B. Food: It stores chemical energy and gives no light.
• C. Heat: It is a form of energy, not a source of light. Heat and light often come together, as with the sun, but heat alone is not a light source.
• D. Petrol: It is a fuel that stores chemical energy. It is refined by humans, so it is not a natural source of light.
• E. Sun: It is natural and it produces light, so it fits both conditions.

Step 4: Answer The correct option is **E.

Tip: When you see "natural source of light," think of the sun first. In Biology, link the sun to photosynthesis: sunlight → plants → food → energy for animals. This chain shows up often in NECO and WASSCE questions on energy flow.