The following are the major reasons why the butterfly lays eggs under the surface of a leaf except to

Analyze the question: Butterflies lay eggs on the underside of leaves. We are asked which option is NOT a major reason for this behaviour (the "except" question).

Concept: Laying eggs under a leaf offers the eggs several advantages:

• Shade: The underside is protected from the sun's direct heat, which could dry out or kill the eggs. (A is a reason.)
• Protection from predators: Eggs hidden beneath the leaf are harder for birds and other predators to see and reach. (B is a reason.)
• Protection from rain: The leaf acts like an umbrella, so raindrops cannot wash the eggs away. (C is a reason.)
• Camouflage: This is the weakest reason. Butterfly eggs are often small, pale, or differently coloured from the leaf, and they are not typically coloured to blend in with it. The hiding effect comes from their position under the leaf, not from colour matching. Camouflage means blending into the background by colour or pattern, so it is not a major reason here.

Step-by-step elimination:

1. A: shading from the sun is a real benefit, so it is not the answer.
2. B: protection from predators is a real benefit, so it is not the answer.
3. C: protection from rain is a real benefit, so it is not the answer.
4. D: camouflage is not the main reason, because the eggs are concealed by position rather than by colour. This is the exception.

Answer: D.

Exam tip: For "except" questions, test each option and cross out the true statements. The one left over is your answer. Also keep in mind that "hiding" (concealment by position) is different from "camouflage" (blending in by colour or pattern), and WASSCE sometimes tests that difference.