Do the North and South Poles have wet or dry climates? How do you know?

Both poles are actually dry! It barley rains there and parts of the Arctic are polar deserts

The Poles are very dry. In fact, the South Pole is the driest continent on Earth. In terms of precipitation, precipitation amounts are actually low. In fact, some parts of the Arctic are polar deserts and receive about the same amount of precipitation as the Sahara desert.

Hydrosphere is the correct answer