Desalination purifies seawater by removing salt

Steps:

• Identify the process: Converting seawater to drinkable water requires removing excess salt, as seawater has high salinity.
• Review options: Match each term to its primary function in water treatment.
• Eliminate mismatches: Rule out processes that don't target salt removal.
• Select the match: Choose the term specifically for salt extraction from seawater.

Why B is correct:

• Desalination is defined as the process of removing salts and minerals from seawater to produce fresh, drinkable water, often via methods like reverse osmosis.

Why the others are wrong:

• A. Chlorination adds chlorine to kill bacteria, not remove salt.
• C. Filtration separates particles or impurities but doesn't eliminate dissolved salts.
• D. Neutralisation adjusts pH levels in acidic or basic solutions, unrelated to salt removal.

Final answer: B