Coral reefs occur on the southeast coast of the United States but not at similar latitudes on the southwest coast. Differences in which of the following most likely account for this?
A) air temperatures driven by precipitation
B) day length
C) water temperatures driven by ocean currents
D) salinity differences

Question

Quizplus · Accepted Answer

Coral reefs are highly dependent on warm water temperatures, typically above 68°F (20°C), for their survival and growth. On the southeast coast of the United States, warm water from the Gulf Stream current flows northward and provides suitable conditions for coral reefs. In contrast, the southwest coast of the United States is influenced by cold ocean currents that flow southward, resulting in cooler water temperatures that are not conducive to coral reef formation. Therefore, the difference in water temperatures driven by ocean currents is the most likely factor accounting for the occurrence of coral reefs on the southeast coast but not the southwest coast of the United States.

Coral Reefs Occur on the Southeast Coast of the United