"methods a and b are classified as methods of passive transport because they do not require
(1)atp
(2)carbon dioxide
(3)light
(4)dna
"

1 - ATP

Passive transport is characterised by being passive, in this case, not requiring any energy (ATP), opposite from the active transport represented in image C.

Hope it helped,

BioTeacher101

(If you have any questions, feel free to ask them in the comments)

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.