Question

another major way climate change affects the hydrologic cycle is by increasing
of both polar and mountain and snow.

Explanation:

Climate change leads to higher temperatures. Higher temperatures cause the melting of polar ice - caps (large masses of ice in polar regions) and mountain glaciers (large bodies of ice in mountainous areas). Melting of these ice - related features is a significant way climate change impacts the hydrologic cycle as it adds more water (from melted ice) into the cycle.

Answer:

melting; ice - caps; glaciers