Most large cities get water for households and industries from
a. rivers and lakes
b. pumps connected to springs
c. deep wells
d. removing salt from sea water

The answer is letter A.

Most large cities get water for households and industries from rivers and lakes. These are called raw water collection points that undergo treatment within water facilities. After treatment, they are eventually transferred to series of connecting pipes that are found underground which then find its way to every household and industry within large cities. They can now be potable and used for other household or production needs.

Most large cities get water for households and industries from rivers and lakes - A.

The correct answer in your case is A.

The reason why the y do this is because it is very convenient for a large city to simply use up the resources of a particular environment. The problem can arise, however, when a city starts using up more resources that are available in their current environment.

Carbon monoxide is usually more dangerous indoors.