Directions: Read the passage and answer the following questions. Sound is caused by vibrations. Air is a gas water is a liquid. Gases are very thin in comparison to liquids, so when a sound travels through air it vibrates the air very easily without much distortion (changes). When a sound travels through a liquid it has to move through a thicker substance. This means that the sound has more difficulty causing the vibrations. So although sound travels better in water, it is harder to hear properly. Although sound travels better in water, it is ___ to hear properly.

• A. Better              
• B.          smoother      
• C. Harder            
• D.          comfortable