At the end of the Ordovician,many shallow-marine organisms went extinct due to
A)deep water predators.
B)a long duration of high sea level.
C)cooling temperatures,increased glaciation,and decreased sea level.
D)cooling temperatures,increased glaciation,and a rise in sea level.

Question

Quizplus · Accepted Answer

The cooling temperatures and increased glaciation during the end of the Ordovician led to a decrease in sea level, which negatively impacted shallow-marine organisms. Deep water predators (A) and a long duration of high sea level (B) were not significant factors in the extinction of these organisms. Option D includes a rise in sea level, which is contradictory to the actual scenario.

At the End of the Ordovician,many Shallow-Marine Organisms Went Extinct