Unlike most other primates, scientists speculate that humans evolved the ability to walk upright on two legs. Which term describes the ability to walk on two legs?

a adaptation is when organism changes itself to fit the environment

ex. when its cold outside i wear a jacket

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i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.

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."