Which is an example of a reflex?
a blue jay gathers materials to build a nest in a tree.
a snake searches for food when it becomes hungry.
a bobcat’s eyes adjust to the darkness by allowing more light in.
a goose migrates south around the same time every year.

answer; i believe the correct answer to the above question is ( friction)

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.