The development of pubic hair, though located around the external genitalia, which are involved in reproduction, is still considered

The correct answer is secondary sexual characteristic.
These are the characteristics that start developing in humans during puberty. Primary sex characteristics are obviously reproductive organs, but secondary characteristics refer to pubic hair, enlarged breasts with females, and facial hair/Adam's apple with males.

If you get a map and put the countries a states all together it forms all one piece you can also tell because of the earth quakes