Can someone help me with this? (NO LINKS!)

The protects the ear, collects sounds, and channels them to the middle ear a middle ear b ear drum' c front ear d outer ear

Based on the sentence, what does a studious effort require

For platowhich kinds of materials were used to make dwellings in the neolithic period? a) bones, tusks, and branchesb) small stones and pebblesc) large stones and wood ((answer))