Which of the following countries has the highest number of active volcanoes?

What is the name of the volcano that is the highest peak in Japan? Which igneous rock forms from the slow cooling of magma deep underground? What is the name of the largest volcanic caldera in Indonesia? What is the name of the largest active volcano on Earth, located in Hawaii? What is the name of the volcanic island that was formed in 1963 off the coast of Iceland? What is the name of the volcanic island that was devastated by the 1815 eruption of Mount Tambora? Which type of volcano is characterized by its small size and steep, conical shape? What is the largest national park in the United States?