The statement that best compares how both industries can benefit water sources in the watershed is:
The wastes from the zoo are safer to add to the water than those from the farm.
This statement highlights a key difference in how the waste from each entity interacts with the water sources in the watershed, suggesting that the zoo's waste may pose less of a risk to water quality compared to the farm's waste. While the other statements focus on the need for water or the use of water, they don't specifically address the potential impacts on water sources.