Answer:
A landform is a feature on the Earth's surface that is part of the terrain. Mountains, hills, plateaus, and plains are the four major types of landforms. Minor landforms include buttes, canyons, valleys, and basins. Tectonic plate movement under the Earth can create landforms by pushing up mountains and hills.
Explanation:
Because it could lead to possible treatment for spinal cord injuries diabetes and other diseases
I think it is D but I'm not sure, however, 4 seems pretty right.
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