Answer:
otayy, leo.
the oldest mountain, we can say its been around for a while now so it would make sense as to why it would be leo. since its been around the earth has changed and moved shifting plates etc, this takes time. making leos answer make more sense. again im not sure abt this response but this answer (leo) should be right
Answer: El Salvador
Explanation: El Salvador has a population density of 303 people per square kilometer (785 per square mile).
Believe Mount Vesuvius is in Italy
I do believe that the answer is Finland.