Question

add a comma or semicolon if needed. otherwise, submit the text without any additional punctuation.

people living near italys mount etna, an active volcano, have tried to redirect the flow of lava for hundreds of years and they have even used explosives to divert the flow away from towns.

Explanation:

The two independent clauses "People living near Italy's Mount Etna, an active volcano, have tried to redirect the flow of lava for hundreds of years" and "they have even used explosives to divert the flow away from towns" are connected by the conjunction "and". When two independent clauses are joined by a coordinating conjunction (like "and", "but", "or", etc.), a comma is used before the conjunction. So we add a comma before "and".

Answer:

People living near Italy's Mount Etna, an active volcano, have tried to redirect the flow of lava for hundreds of years, and they have even used explosives to divert the flow away from towns.