Which characteristic of sound makes it possible for bats to fly in the dark without hitting any objects? A. refraction

B. reflection

C. conduction

D. amplification

Two liquids are poured into a beaker. after a few seconds, the beaker becomes warm. which of the following best describes this reaction? a. an exothermic reaction b. a decomposition reaction c. an endothermic reaction d. a single-displacement reaction