Answer
The correct answer would be auricle and auditory canal.
The auricle or pinna is the externally visible part of the ear. it is mainly composed of cartilages and integuments. It is connected to the surrounding parts with the help of muscle and ligaments.
It helps in focusing the most of the sound vibrations towards inside the ear.
It opens into the auditory canal which serves as the pathway for sound waves to the inner ear (tympanic membrane).
6CO2+12H2O+light->C6H12O6+6O2+6H2O
1. four, bond
2. Cohesion
3. Adhesion is correct ... looked in my bio book sorry