Which of the following is an example of an adaptation for survival in social insects?

Step 1: Analyze the question The question asks for an adaptation for survival that is specific to social insects, such as ants, termites, and bees. The key phrase is "social insects", so the answer should relate to living in organized colonies.

Step 2: Explain the concept Social insects live in colonies with a division of labour. This is called polymorphism or the caste system. Each caste has a specific job:

• Queen: reproduction (lays eggs)
• Drones/males: mating with the queen
• Workers: food collection, nest building, caring for the young
• Soldiers (in termites and ants): defending the colony

This division of labour makes the colony efficient and improves the survival of the whole group.

Step 3: Evaluate each option

• A. Migration to warmer climates: This is seen in birds and some animals (and a few insects, like certain butterflies). It is not unique to social insects.
• B. Production of venom for defense: Bees and some ants do this, but so do solitary animals such as snakes, scorpions, and spiders. It is not specific to social living.
• C. Formation of complex caste systems: This is the defining feature of social insects, and it is what lets colonies survive and function as one unit.
• D. Hibernation during winter months: Many animals do this (bears, frogs, solitary insects). It is not specific to social insects.

Step 4: Answer The correct option is C. Formation of complex caste systems.

Exam tip: When a question says "social insects", think colony, caste, division of labour. Remember the phrase "Queen, Workers, Soldiers, Drones". If an option describes something many different animals do (migration, hibernation, venom), it is probably not the answer to a question about a specific group.