The Tundra.. IT HAS THE COLDEST TEMPS.
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Explanation:
In the lungs CO2 is removed from the blood and send out the body where we exhale
When the continents are at the Earths poles, they receive less sunlight.
The landscape in which limestone is eroded to form deep valleys and cavers are called Karst landscape or karst topography. This kind of development start occuring whenever the acidic water starts breaking down the bedrocks near the cracks. As the bedrock starts breaking down slowly, the cracks start to open up creating bigger holes. with passage of time the holes will become big enough to create an underground drainage system for the surface water to flow and form underneath. If the water is unable to flow out and becomes stagnant, then the Karst will start getting bigger.
