The correct answer is (a) Hawaii Islands.
Mauna Loa is the largest volcano on Earth in terms of both volume and surface area. It is located on the island of Hawaii in the Hawaiian Islands. The volcano is part of the Hawaiian-Emperor seamount chain, which is a chain of volcanoes that formed over the Hawaiian hotspot. Mauna Loa is a shield volcano, which means that it has a broad, gently sloping profile. The volcano is still active and has erupted over 30 times in the past 100 years. The most recent eruption occurred in 1984.
The other options are incorrect. Alaska is home to several active volcanoes, including Mount St. Helens and Mount Redoubt. Italy is home to several active volcanoes, including Mount Vesuvius and Etna. Japan is home to several active volcanoes, including Mount Fuji and Mount Aso.