Question

in the florida keys, the coral reefs are declining due to rising nitrogen, falling phosphorus and one other factor:
warming waters
cooling waters
increased ph
decreased runoff
rewatch
submit

Explanation:

Warming ocean waters cause coral bleaching, a major driver of coral reef decline in regions like the Florida Keys. Cooling waters do not harm these reefs, increased pH is not a threat (ocean acidification involves decreased pH), and decreased runoff would reduce nutrient pollution, which helps reefs rather than harming them.

Answer:

Warming waters