The largest freshwater reservoir on the Earth's surface is __ a Groundwater b Wells c Polar ice caps d All of the above

## Step 1<br />The question is asking for the largest reservoir of freshwater on the Earth's surface. The options provided are groundwater, wells, and polar ice caps.<br /><br />## Step 2<br />Groundwater refers to the water found underground in the cracks and spaces in soil, sand, and rock. It is stored in and moves slowly through geologic formations of soil, sand, and rocks called aquifers.<br /><br />## Step 3<br />Wells are man-made structures that are used to access groundwater.<br /><br />## Step 4<br />Polar ice caps are large areas of ice that cover the North and South Poles. They contain the largest amount of freshwater on the Earth's surface.<br /><br />## Step 5<br />Based on the above information, the correct answer is "c. Polar ice caps".