The short thick beak in birds is an adaptation for

Analyze the question: It asks what function a short, thick beak is adapted for. Bird beaks are shaped according to the food they eat.

Concept: Beak shape matches diet (adaptive radiation, as seen in Darwin's finches):

| Beak type | Adaptation | |---|---| | Short, thick, strong (e.g., weaverbirds, finches, parrots) | Crushing or cracking seeds and grains | | Long, slender, pointed (e.g., sunbird, hummingbird) | Sucking nectar | | Hooked, sharp (e.g., eagle, hawk) | Tearing flesh | | Broad, flat with filtering edges (e.g., duck) | Straining mud and water for food |

Solution:

• A. Crushing seeds: A short, thick beak is strong and gives great force, so it suits cracking hard seeds. ✔
• B. Sucking nectar: This needs a long, thin beak to reach into flowers. ✘
• C. Tearing flesh: This needs a sharp, hooked beak. ✘
• D. Straining mud: This needs a broad, flat beak with filter plates. ✘

Answer: A. crushing seeds.

Exam tip: Link the beak's shape to its job:

• Thick and short means crushing.
• Long and thin means nectar.
• Hooked means flesh.
• Flat and broad means straining.

Seed-eaters like the weaverbird are common in Nigeria, so picture one when you see this question.