Use the list of insects below to answer the question below; I. Cotton stainer II. Honeybee III. Termite IV…

Analyze the question: You are asked which insect in the list destroys stored grains (like maize, rice, beans, and wheat).

Explain the concept: Insects are classified by their roles and the damage they cause:

• Cotton stainer (I): A bug that feeds on cotton bolls and stains the lint. It is a pest of cotton, not of stored grains.
• Honeybee (II): A useful insect. It pollinates flowers and produces honey and beeswax.
• Termite (III): It destroys wood, paper, and crops in the field, and it damages buildings. It is not the typical grain pest.
• Weevil (IV): A small beetle. The adult and its larvae bore into stored grains and seeds. They eat the inside and leave the grain hollow and powdery. Examples are the maize weevil (Sitophilus zeamais) and the rice weevil.

Solution:

1. Cotton stainer attacks cotton, so it is eliminated.
2. Honeybee is beneficial, so it is eliminated.
3. Termite attacks wood and buildings, so it is eliminated.
4. Weevil destroys stored grains, so it is the answer.

Tip: Link each pest to what it attacks:

• Cotton stainer → cotton
• Weevil → stored grains
• Termite → wood
• Honeybee → honey and pollination

If you see "grains" in a question, think of weevils.