Why are the threats to fish more alarming than the threats to animals and birds? A: Because fish is a much needed food resource. B: Because plenty of fish is killed every year. C: Because fish is the only diet for many people. D: Because the sea fisheries are going to be exhausted.

The diagram shows fish kills that have been linked to toxic algal blooms. Based on the lettered fish kills, which of the following is FALSE regarding toxic algal blooms? A: Toxic algal blooms are problematic becasue they often contaminate the drinking water supplies of large cities nearby (location B). B: Toxic algal blooms are found near river deltas that contain agricultural runoff emptying into the sea (location B) C: Toxic algal blooms release toxins that can accumulate in the shellfish and have killed southern sea otters near D: Toxic algal blooms tend to have negative economic impacts on fisheries at B and E: When toxic algae die, the oxygen demand increases due to decomposition. This leads to loss of dissolved oxygen in the coastal areas like