Answer:
The correct answer would be biological diversity
Biological diversity or biodiversity refers to the sum up of all the variety of life living on the planet earth.
It measures variation at three levels; ecosystem, species, and genetic levels.
Genetic variation refers to all the variation present at the genetic or genes level.
Species variation refers to the variety of species present in an area.
Ecosystem variation refers to the different types of habitats, biological communities, ecological processes et cetera.