Biologists hypothesize that bats use echolocation calls not only to navigate but also to communicate territorial claims to other bats.
Which observation, if true, would most strongly support the biologists' hypothesis?
- A
Bats have been the subject of acoustic research for decades.
- B
Some bats roost in caves with thousands of other bats.
- Ccheck_circle
Bats produce calls with distinct acoustic signatures when other bats are nearby, and intruder bats reduce their activity in regions with these signals.
- D
Bats use sonar-like calls to detect insects in flight.
Explanation
A shows social-context-dependent calls and behavioral responses by other bats, fitting the territorial-communication hypothesis. B is about navigation; C and D are tangential.