By what process do sperm cells multiply?

Sperm cells multiply through the process of mitosis rather than meiosis. Mitosis is a type of cell division that results in two genetically identical daughter cells and is primarily responsible for growth, tissue repair, and asexual reproduction in organisms. However, sperm cell formation specifically utilizes meiosis, which is the division process essential for sexual reproduction. During meiosis, a single diploid cell divides to produce four genetically diverse haploid cells, which in this case leads to the formation of sperm.

While fertilization involves the union of sperm and egg, it does not pertain to the multiplication of sperm cells. Apoptosis, on the other hand, refers to programmed cell death, which is not a multiplication process. In summary, meiosis is accurately identified as the correct answer for the multiplication of sperm cells, as it produces haploid gametes necessary for reproduction.