Which one of the following makes a tool with a stick to scrape insects from a hole in a tree or a log of wood?

Answer: B. The Orangutan is known to fashion stick tools to extract insects from holes in wood. Tool use among great apes is well documented. Wild orangutans in Sumatra (notably the Suaq Balimbing population) use sticks to extract honey, ants and termites from tree cavities. They also fashion leaf-pads as gloves and umbrellas. Tool use is socially transmitted within orangutan groups. Chimpanzees also use stick tools (Jane Goodall's famous discovery of 'termite fishing' in Gombe). But the question asks about an orangutan-style technique. Distractors fail: (A) Fishing cats hunt fish with paws/jaws — no documented stick tool use. (C) Otters use stones to crack shellfish (especially sea otters) but not sticks for insect extraction. (D) Sloth bears use their long claws and powerful suction (lips) to extract termites; no stick tools. Source: Primate research literature (van Schaik et al.) / NCERT Class 11 Biology.