Hi There! :)
<span>The process that causes some fossils to appear on more than one continent is called what?
</span><span>continental drift</span>
The changes. You are measuring change. It could be Temperature, height, or any other form.
Answer: 0.69 m/ mile.
Explanation:
The altitude gradient between two cities X and Y = 
Given: Two cities are separated by 200 miles.
City X has an altitude of 122 meters.
City Y has an altitude of 260 meters.
The altitude gradient between two cities X and Y =

Hence, the altitude gradient between the two cites = 0.69 m/ mile.