Fact 1: Some insects can use their antennae to detect sound.

Fact 2: Every insect has six legs, that's an insect.

Given the two facts above, answer the question "How can animals with six legs detect sound?" with the following options: 
- thorax
 - Refract it
 - electricity
 - they bend
 - wings
 - environment
 - pupils
 - antennae


 

        antennae 