Which of the following poses the greatest risk for species extinction?. a ... expansion of human cities. b ... increased levels of pollution. c ... intense hurricane activity. d ... UV radiation and the hole in the ozone layer.

The situation that poses a greater risk for species extinction is A. expansion of human cities. In this situation, the expansion leads to the depletion of the habitat of animals specifically the forest which is the home to many species. When the habitat is destroyed, most species will have difficulty to thrive in other types of environment.