Julie watched an old news video of the last explosive eruption of Mount Pinatubo. She lived in Tagaytay, and she thought that Taal Volcano in the past did not erupt the way Mt. Pinatubo did because it was located within a lake, while the other is directly situated on the land. Thus, she inferred that volcanoes erupt differently because of their composition and location. Which among the following statements is NOT a basic feature shared by all volcanoes if you were to explain this to Julie?