Question

which desalination process requires the least energy?
multiple choice
reverse osmosis
distillation
ion exchange
freezing
electrodialysis

Explanation:

Reverse osmosis is a membrane - based desalination process that generally requires less energy compared to thermal processes like distillation. Ion exchange, freezing, and electrodialysis are also energy - consuming processes, but reverse osmosis is more energy - efficient among these options for desalination.

Answer:

Reverse osmosis