Option 1: Vesuvius is a well-known volcano located in Italy. It is famous for its eruption in 79 AD that destroyed the ancient city of Pompeii.

Option 2: Stromboli is the correct answer. It is an active volcano located in the Tyrrhenian Sea, off the north coast of Sicily, Italy. It has been erupting almost continuously for over 2,000 years, with frequent small explosions that can be seen from a distance. Due to its consistent and visible activity, Stromboli is often referred to as the "lighthouse of the Mediterranean."

Option 3: Etna, also known as Mount Etna, is another active volcano in Italy. It is the largest and most active volcano in Europe, with frequent eruptions and lava flows. However, it is not commonly referred to as the lighthouse of the Mediterranean.

Option 4: Vulcan is a term commonly associated with volcanoes, but it does not refer to a specific volcano. It is a general term used to describe any volcano or volcanic activity.