That should be your answer
Answer:
Numerical time is absolute while relative is compared.
Explanation:
Numerical time is essentially the age of an object. Numerical time is also called absolute time because the age is given as a number that expresses (usually) how many years old it is.
Relative time, rather than give an age, places a rock or rock layer in a category based on how it fits into Earth's evolutionary history as a planet and the fossil record.
A. elevation because when talking about how many ft something is above sea level it is always talking about elevation
The fence built on the hill's slop over time will fall. It will not be a sudden process though, but slowly, the fence will bend over till it falls. This will be caused by the erosion, over time little by little the hill will be eroding because of the natural phenomenons like the wind and the rain (depending on the place where the hill is, maybe ice as well), so there will come a point where the basis of the fence that were once in the ground will be uncovered and there will be nothing to hold it, so it will fall.
I know that Boston is a main port of the American Economics, so they would want it for exporting and importing goods. I would assume that Philadelphia would have a related cause.
