Which of the following is NOT a cause of extinction?

Natural migration is not a cause of extinction because it is a natural process that enables species to move and adapt to changing environments. Through migration, species can find new habitats that may offer better resources, such as food and mating opportunities, especially in response to climate changes or shifts in resource availability. This adaptability promotes survival rather than decline.

In contrast, habitat destruction, pollution, and poaching and illegal hunting are all human-induced factors that negatively impact populations and can lead to extinction. Habitat destruction limits the areas where species can live and reproduce. Pollution can harm organisms directly or disrupt ecosystems, leading to declines in population. Poaching and illegal hunting reduce population sizes drastically, often targeting endangered species, which can lead to their extinction. These factors create unsustainable pressures on species, making it difficult for them to survive in the long term.