Answer:
Option. B) As the pH decreases, the number of surviving species decreases.
Explanation:
Marine animals is greatly affected by the pH of water. If the pH of the water decreases, the marine animals could not survive and die due to acidification of water. Marine animals grow well in optimum pH of the water. If the water is alkaline i. e. having high pH, the marine animals are adversely affected and decrease occurs in the population of fishes and other marine animals.