How do plants obtain nitrogen?
a-they remove it from the air.
b-they absorb it through their roots.
c-they fix it in their leaves.
d-they produce it in their stems.

B. They absorb it through their roots

Explanation:

When nitrogen is released in the air plants cannot remove it through the air directly. They have to absorb it through another part of the plant. With that being said they have to absorb it through there roots.

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.