Mitochondria and chloroplasts.
Hope it helped!
Conservation is the protection of an organism or a group of organisms (like an endangered species or forests).
Biodiversity is the numerous amounts of species habitated in our earth. The more biodiversity, the better.
Conservation protects biodiveristy, thus, allowing more species to survive and thrive.
The horsehoe crab because it was one of the first animals to ever live on earth