Answer:
D) testes
Step-by-step explanation:
Gonad is also known as a sex gland or a reproductive gland. It is a gland that primarily produces both sex cells and sex hormones.
In females,
The reproductive cells are egg cells that are produced by the ovary.
In males,
The reproductive/sex cells are the sperms that are produced by the testes in the form of spermatozoa.
Seminal vesicles, vas deferens, prostate gland are parts of male reproductive system and are not gonads. They do not produce sperms.
Option D is correct.