Final answer:
FSH in females promotes the development of egg cells and in males, it supports spermatogenesis. FSH does not trigger ovulation; this is the function of LH. Hence, the correct function of FSH is to promote follicle development and spermatogenesis (option B).
Step-by-step explanation:
The function of follicle-stimulating hormone (FSH) differs between genders. In females, FSH promotes the development of egg cells (ova), which develop in structures called follicles.
These follicles also release estrogens in ovaries. However, FSH does not directly promote ovulation; that is the role of luteinizing hormone (LH), which triggers both ovulation and the production of estrogens and progesterone by the ovaries.
In males, FSH is primarily responsible for the maturation of sperm cells, a process known as spermatogenesis. Therefore, the correct answer to the question is (B) promotes development of follicles and spermatogenesis.