Juan and Joseph are opera singers. Juan is a baritone. Joseph is a tenor, so his voice is higher-pitched than Juan's voice. With respect to their physical properties, the sound waves corresponding to Juan's voice are lower in than those corresponding to Joseph's voice.

Frequency

Explanation:

Sound waves are often produces by vibration. Soundwave measurement is associated with its frequency. That is the number of sound wave that passes through a given place at a given time.

From the established argument, the sound wave frequency of Juan's voice is lower than Joseph's .

personal-

communication, mobility, cooking, using the telephone, cleaning the house, doing laundry,   going to the bank, and managing medications.

social-

music, art groups, cooking and gardening. outdoor activities are shopping, eating out, theatre trips and sailing.

ethical-

honestly, integrity, loyalty