Answer:
The correct answer is species diversity.
Step-by-step explanation:
The diversity of organisms found in the Tundra region is quite high. Various diverse species containing different organisms are found in these regions that make them a miscellaneous region on the planet Earth. The mechanism or the phenomenon accountable for these diverse populations is the species diversity.
Species diversity can be illustrated as the entire sum of species found in a given community. Hence, the correct answer is species diversity.