Question

3 produces a thick, viscous fluid that contains nutrients (fructose) needed by sperm for its journey to fertilize an egg

Explanation:

This describes the function of the seminal vesicles, a male reproductive gland that secretes a fructose-rich, viscous fluid which provides energy for sperm motility during fertilization.

Answer:

Seminal vesicles (the male reproductive gland that produces this fluid)