Fact 1: Some insects can use their antennae to detect sound. Fact 2: Sound waves are compressional waves. Given the two facts above, answer the question "what do some insects use their antennae to detect?" with the following options: - members of their own species - spiders - heat and light - an area swollen with pus - compressional waves - density - h2o - electromagnetic energy
A:
compressional waves