Why is freshwater a limited resource?

A. because most water on Earth is in lakes
B. because most water on Earth is in clouds
C. because most water on Earth is in the ground
D. because most water on Earth is saltwater

D

Right.

The correct answer is D. Freshwater is a limited resource because most water on Earth is saltwater. Approximately 97% of the Earth's water is in the form of saltwater in oceans and seas, which is not suitable for direct human consumption or for irrigation in agriculture. Only about 3% of the Earth's water is freshwater, and only a tiny fraction of that freshwater is easily accessible for human use.

To find this answer, you could have eliminated options A, B, and C by understanding that lakes, clouds, and groundwater are all sources of freshwater, whereas the question asks about why freshwater is a limited resource. This leaves you with option D, which correctly states that most water on Earth is saltwater.

D. because most water on Earth is saltwater