Final answer:
Limiting human activities in the mulgara habitat would ensure the natural survival of the population.
Step-by-step explanation:
The best option to ensure the natural survival of the mulgara population is to limit human activities in the mulgara habitat. By minimizing human impact, such as habitat destruction or pollution, the mulgara species can thrive in their natural environment.
On the other hand, clearing the habitat of plant life and building mulgara shelters would not be beneficial because the mulgara's habitat includes vegetation that is part of their ecological balance. Removing all other animal species from the habitat would disrupt the natural ecosystem and could negatively impact the mulgara population. Lastly, introducing another small carnivorous species to mate with the mulgara might introduce competition or diseases that could harm the mulgara population.
Learn more about mulgara population survival