A moraine is a type of landform feature which is formed by the retreating glacier. It forms a ridge like structure due to the deposition of sediments, stones, pebbles and other materials. The debris are typically sub angular to round in shape. The moraines can be found over the glacier surface as piles of sheets of debris.
On the basis of the above description, moraine is the ridge feature which has been described in the given situation.
B. because natural selection is when the environment causes an organism to evolve, the climate becoming colder and wetter would likely overtime cause the rats to have thinner hair and have skin that can handle staying wet more
