What are the body structures that make sexual reproduction possible called?

The correct answer highlights primary sex characteristics, which are essential for sexual reproduction. These are the biological features directly involved in the reproductive process, including structures such as the ovaries and testes. Primary sex characteristics develop during puberty and are critical for the production of gametes (sperm and eggs), which are necessary for fertilization and the continuation of species.

Understanding primary sex characteristics is key to grasping how sexual reproduction functions biologically. These characteristics are distinct from secondary sex characteristics, which pertain to features not directly involved in reproduction but are associated with sexual maturity and gender differentiation, such as breast development or facial hair.

Reproductive organs encompasses a broad category that includes both primary and secondary structures involved in reproduction. While this term is relevant, it lacks the specificity that primary sex characteristics provide in the context of the question.

Sexual characteristics is a more general term that can refer to both primary and secondary features. Therefore, while related to the topic, it does not specifically identify the structures critical to the reproductive process.