Question

Which pair BEST identifies a cause and its effect related to the relationship described in Source 1?


Cause: hair cells move
Effect: sound waves move toward person

Cause: person leans head toward ground
Effect: hair cells move

Cause: sound waves move toward person
Effect: hair cells move

Cause: hair cells move
Effect: person leans head toward ground

Answer 1

Cause: sound waves move toward person
Effect: hair cells move

Explanation: Incoming sound waves cause vibrations in the ear (eardrum/ossicles and cochlear fluid) that bend hair cells, so the sound waves are the cause and hair cell movement is the effect.