Question

unpolluted freshwater supplies
select one:
○ a. are available to most of the people of the world.
○ b. are primarily provided by groundwater.
○ c. typically require treatment before being delivered to homes.
○ d. are becoming more common as sources of pollution are eliminated.

Explanation:

Even unpolluted freshwater often has minerals, microorganisms or other substances that may not be suitable for direct - use at homes. So, it typically requires treatment like filtration, disinfection etc. before being delivered to homes. Option a is incorrect as many parts of the world face water scarcity and lack of access to unpolluted freshwater. Option b is wrong because surface water also contributes significantly to freshwater supplies. Option d is incorrect as despite efforts to eliminate pollution sources, unpolluted freshwater is still not becoming more common due to various factors like over - extraction and climate change.

Answer:

C. typically require treatment before being delivered to homes.