The principle of crosscutting relationships, the law of superposition, the principle of original horizontality, inclusions, and unconformities help earth scientists date rocks and are examples of

I think the answer is "Steno's principles".

Explanation:

the answer is "a.) well–developed vascular system."

explanation:

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.