The most scientifically accurate response regarding the relationship between the pH of pond water and the survival rate of animal species living in the pond is:
B. As the pH decreases, the number of surviving species decreases.
This is because many aquatic organisms have specific pH requirements. Generally, lower pH (more acidic conditions) can be harmful to fish and other aquatic life, leading to a decrease in the number of surviving species. However, it's important to note that the specific effects can vary depending on the species and the extent of the pH change.