Your friend, who tans easily, argues that it's great to get a tan because darker skin pigmentation offers lots more protection from damaging UV radiation, so he's keeping himself safe. Would you agree? Explain.

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.

here's your answer.