Asap extra points how long did life exist on earth before anything resembling man appeared? select one: a. nearly 1 million years b. nearly 1 billion years c. nearly 4 million years d. nearly 4 billion year

c-nearly 4 billion years

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.

c should be the answer