A is written correctly! easy peasy :)
Answer:
Volcanic Activity.
Explanation:
The Hawaiian Islands were formed by such a hot spot occurring in the middle of the Pacific Plate. While the hot spot itself is fixed, the plate is moving. So, as the plate moved over the hot spot, the string of islands that make up the Hawaiian Island chain were formed.
Because the other two are for introduction paragraph, which is 1st, and last is conclusion.
Hope that this helps!
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