Select items observed by Darwin in Argentina during his journey on the H. M.S. Beagle that resulted from massive geological changes. a. Deeply eroded rivers with exposed layers of sediment.
b. Raised beaches with exposed layers of sediment.
c. Fossilized bones of extinct mammals.

d.

explanation:

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weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

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