Answer:
D, Gene flow had been reduced between flies that feed on different food.
Explanation:
Food and water? If we don't eat or drink we die so therefore that is our energy source.
To produce food and energy for the cell
to start off its almost inpossible to do but...
Methods of Desalination. At least three principle methods of desalination exist: thermal, electrical, and pressure. The oldest method, thermal distillation, has been around for thousands of years. In thermal distillation, the water is boiled and then the steam is collected, leaving the salt behind.