Answer:
C). Scientist
Step-by-step explanation:
Scientist are technical persons and they can understand the language of science and measurements. The sentence, "Using a low - flow shower instead of a high - flow shower heads saves about 3 gallons of water per minute."
So by the language the above sentence is purely technical language. It says we can save approximately 3 gallons of water in one minute if we choose to use a low flow height instead of using high flow height of water shower flow.
A farmer, a politician or a meteorologist may not find some useful information from the above sentence. Hence the answer is Scientist.