Which term best describes navigation based on environmental smells?

Which term best describes navigation based on environmental smells?

• A. Echolocation
• B. Olfactory navigation
• C. Magnetoreception
• D. Zugunruhe

Answer: (B)

Olfactory navigation uses smell cues from the environment to guide movement. Animals detect odors carried by air or water and compare them to familiar scent patterns or gradients, helping them determine direction or location. This lets them find food, mates, or home by following chemical clues. For example, salmon rely on the unique chemical signature of their birth river to swim back upstream and spawn, and many insects follow scent plumes to locate hosts or mates. This idea is distinct from echolocation, which uses sound echoes to sense surroundings, magnetoreception, which detects Earth's magnetic field for orientation, and Zugunruhe, which is migratory restlessness rather than a navigation method.

Olfactory navigation uses smell cues from the environment to guide movement. Animals detect odors carried by air or water and compare them to familiar scent patterns or gradients, helping them determine direction or location. This lets them find food, mates, or home by following chemical clues. For example, salmon rely on the unique chemical signature of their birth river to swim back upstream and spawn, and many insects follow scent plumes to locate hosts or mates. This idea is distinct from echolocation, which uses sound echoes to sense surroundings, magnetoreception, which detects Earth's magnetic field for orientation, and Zugunruhe, which is migratory restlessness rather than a navigation method.