Question

correct the text by inserting one comma. when an earthquake jolted pakistan in 2013 the force caused ocean mud to rise to the surface, creating a small island in the middle of the arabian sea.

Explanation:

A comma is needed after an introductory clause. "When an earthquake jolted Pakistan in 2013" is an introductory adverb - clause, so a comma should be placed after "2013" to separate it from the main clause.

Answer:

When an earthquake jolted Pakistan in 2013, the force caused ocean mud to rise to the surface, creating a small island in the middle of the Arabian Sea.