Which step in a scientific investigation would a scientist usually do before she performs an experiment?

yes? sounds right, but you didn’t ask a question.

human-caused climate hope this

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."

the correct answer is d