Question 1) Choice C; Because any weathering of a rock can create sediment.
Question 2) Lab testing | Lab testing can reveal the age of a fossil by using chemicals.; Looking at the fossil | Even looking at the fossil can tell the scientist an approximate age of the fossil.
Question 3) An example of erosion could be wind or water.
Question 3) We can use fossils to tell how a place looked in the past by seeing what the fossil was of, and by researching about the fossil of the animal. We can also use rocks to see how the place looked back in the past by seeing if there are any marks on the rock.