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.
That’ll be the Nile river
Yes I think because if they swap with each other there would still be magnetic pulls from the same locations
I believe your answer is the year 2020
B. makes because google says so and i believe him