Concept:The "lighthouse of the Mediterranean" is the nickname given to a famous, continuously erupting volcano.Explanation:Stromboli is a volcano situated on Stromboli Island, off the north-east coast of Italy.It is called the "lighthouse of the Mediterranean" because its regular, glowing eruptions act like a natural beacon for sailors.Since Stromboli is a volcanic mountain, the mountain type described is volcanic.Hence, the correct answer is option C, volcanic.Answer:C. volcanic