Final answer:
Seminal fluid neutralizes acid secretions in the female vagina by having a basic pH. It also nourishes sperm and aids their motility.
Step-by-step explanation:
The function of seminal fluid is to neutralize acid secretions in the female vagina. Seminal fluid from the seminal vesicles has a basic pH, which helps counteract the acidic environment so that sperm can survive. Additionally, the fluid contains proteins, fructose, and other substances that nourish the sperm and help them swim.