Final answer:
The Pacific Northwest does not experience hurricanes, but it does experience volcanic eruptions, severe flooding, and massive earthquakes due to its geologic activities related to plate tectonics.
Step-by-step explanation:
The Pacific Northwest region is subject to various natural phenomena due to the tectonic processes of the region. Among them, the one that does not occur is C. hurricanes. This area experiences violent volcanic eruptions, severe flooding, and massive earthquakes as a result of the area’s geological activity, especially the subduction of the oceanic Juan de Fuca Plate beneath the North American Plate. The subduction zone leads to mountain building and volcanic activity, including the eruption of Mount St. Helens in 1980. However, hurricanes, which are tropical in nature, are not common in this temperate region. The theory of plate tectonics explains these phenomena, with earthquakes occurring due to the movement of tectonic plates and volcanic eruptions such as the one that formed the Cascade Range.