Question

the graph shows the ph range of a variety of aquatic organisms. the pink bars on the graph represent the ph range where some common freshwater organisms survive. if the ph of a lake were to start at 3 and become more basic, at what ph would these freshwater organisms begin to die out? ph 4.0 ph 4.5 ph 5.0 ph 5.5

Explanation:

Step1: Analyze the graph

The graph shows the pH - survival range for different fish species. As the pH starts at 3 and becomes more basic (increases in value), we need to find the pH at which the survival range of all the fish species ends.

Step2: Identify the upper - limit pH

Looking at the graph, the highest pH value at which the pink bars (indicating survival range) for all the fish species end is 5.5.

Answer:

pH 5.5