Mauna Loa ia an active volcano of

Alaska
Hawaii
Italy
Japan

The correct answer is (b) Hawaii. Mauna Loa is the largest volcano on Earth in terms of both volume and surface area. It is located in the Hawaiian Islands, which are part of the United States. Mauna Loa is an active volcano, meaning that it has erupted in the past and is likely to erupt again in the future. The last eruption of Mauna Loa was in 1984.

(a) Alaska is home to several active volcanoes, including Mount St. Helens and Mount Redoubt. However, Mauna Loa is not located in Alaska.

(c) Italy is home to several active volcanoes, including Mount Vesuvius and Etna. However, Mauna Loa is not located in Italy.

(d) Japan is home to several active volcanoes, including Mount Fuji and Sakurajima. However, Mauna Loa is not located in Japan.