B. Desalination.
Saudi Arabia is the largest producer and (I think) consumer of desalinated water in the World. This allows coastal countries without freshwater aquifers to turn the ocean into safe drinking water that will sustain growing populations.
The (key)substrate fits into the active site of the (lock)enzyme.
Answer: (A) Face-to-face interview
Explanation:
The face-to-face interview is one of the method of data collection by communicating directly with the other person.
This type of interview basically ensure the quality of the given data and it also helps in increase the total rate of the response.
The main purpose of the face to face interview is to explore the information by directly communicate with the person and also judge their capabilities.
Therefore, Option (A) is correct.
