Answer:
The correct answer is - to provide a slightly cooler temperature.
Step-by-step explanation:
The scrotum is a sac pf skin and superficial fascia that contains testes present outside of abdomopelvic cavity or ventral body cavity, hanging provides a slightly cooler temperature f at roots of penis.
Testes produces sperm, for the sperms it require to be cooler temperature than the body cavity or optimal sperm production will be hampered. Scrotum gives 3 degree temperature less than the body cavity.
Thus, the correct answer is : to provide a slightly cooler temperature.