The correct answer is b) ice caps and glaciers.
Explanation: Ice caps and glaciers hold approximately 68.7% of the world’s freshwater resources. This is a significant portion compared to other sources of freshwater. While rivers, lakes, and the atmosphere do contain freshwater, they account for much smaller percentages. For instance, lakes contain about 20.1% of freshwater, aquifers hold around 30.1%, and rivers only make up about 0.006%. The vast majority of Earth’s freshwater is locked in the icy confines of glaciers and polar ice, making them the largest reservoir of freshwater available on the planet.