The most accurate comparison between floods and tsunamis is:
Both floods and tsunamis can cause large impacts with destructive amounts of water. However, a tsunami is a giant ocean wave created by earthquakes and volcanic eruptions. A flood is a large amount of water on land that’s normally dry.
This response correctly identifies the primary differences in their causes: tsunamis are typically initiated by geological events, while floods occur when there is an overflow of water in areas that are usually dry. The other responses contain inaccuracies regarding the causes of floods and tsunamis, particularly suggesting that both are caused by storms or misidentifying their nature.