Final answer:
Primate species other than humans face endangerment primarily due to habitat loss, overharvesting, and introduction of exotic species, which are consequences of human population growth and resource use. Climate change and pollution also contribute to the threat to primate biodiversity.
Step-by-step explanation:
All primate species other than humans are endangered, or soon will be, primarily because of a combination of human-related factors. The three greatest proximate threats to primate biodiversity are habitat loss, overharvesting, and the introduction of exotic species. Habitat loss and overharvesting stem directly from human population growth and the unsustainable use of natural resources. Moreover, the introduction of exotic species is linked to increased human mobility and international trade. These activities disrupt local ecosystems and can outcompete or prey on native species, including primates.Another looming cause of extinction is anthropogenic climate change, resulting from the human need for energy and the consequent burning of fossil fuels. Climate change leads to alterations in temperature and sea levels, which can be detrimental to many species. Lastly, environmental problems such as toxic pollution also pose threats to biodiversity, though currently not at the same magnitude as the other factors mentioned.