What should the nurse inform preadolescents about primary sex characteristics?

The correct answer emphasizes that primary sex characteristics are fundamentally linked to reproduction. Primary sex characteristics refer to the physical and biological attributes directly involved in reproduction, such as the development of the reproductive organs (e.g., ovaries and testes). These characteristics are essential for the functionality of the reproductive system and play a primary role in sexual maturation during puberty.

When discussing primary sex characteristics with preadolescents, it's important to communicate that these characteristics form the basis of biological sex and are necessary for reproductive capability. Understanding this link helps preadolescents grasp the biological functions that come with maturation, which can be an important aspect of their overall development and education about human biology and sexuality.

Other options do not encapsulate this core idea about reproduction: while some may touch upon aspects associated with developmental timing or physical identification, they do not convey the essential connection to reproductive function as clearly as the correct answer does.