Answer:
The Richter Magnitude unit.
Explanation:
The ritcher magnitude scale measures the size of an earth quake. It is a logarithmic representation. For uniformity, consistence of measurements and interpretation of outcomes, this unit is callibrated to represent the log of the largest amplitude on a seismograph.
The correct answer Having a shoreline makes shipment by sea possible, which is less expensive than over land
North African and Middle Eastern countries can't join the EU since they're not from Europe, and regarding security, it's all the same now since it's not the middle ages any more.
The answer is steamboats! The first steamboat came year 1807 and was invented by John Fitch:)
I believe your answer would be A- Farmers and urban dwellers.
Hope this helps. Correct me if I'm wrong.
