Final answer:
Cities near tectonic plate boundaries in the Pacific Ocean would benefit from a tsunami hazard mitigation plan, particularly those along the Ring of Fire, including coastal cities in California, Oregon, Washington, and Alaska. So the correct option is D.
Step-by-step explanation:
The cities that would most likely benefit from a tsunami hazard mitigation plan are cities near tectonic plate boundaries in the Pacific Ocean. Tsunamis are most often caused by earthquakes under the sea, and the Pacific Ocean's "Ring of Fire" is known for its frequent earthquakes and volcanic activity, which can trigger tsunamis. For this reason, coastal cities located along the Ring of Fire, such as those in California, Oregon, Washington, and Alaska, should prioritize implementing tsunami warning systems to give residents adequate time to evacuate in the event of a tsunami.
Adaptation strategies for rising sea levels and storm surges, such as the creation or conservation of wetlands, are also important for these coastal regions. This not only helps with protection against flooding but also enhances the resilience of ecosystems that help buffer the impact of natural disasters.