Which of the following islands is recognized for its volcanic activity?

The island recognized for its volcanic activity is Hawai'i, often referred to as the Big Island. This island is home to some of the most active volcanoes in the world, including Kilauea and Mauna Loa. Kilauea is particularly noted for its continual eruptions over the past several decades, making it a prime location for studying volcanic activity. The presence of these active volcanoes is a result of the island's unique geological formation, as it sits over a hotspot in the Earth's mantle, leading to ongoing volcanic activity.

Kaua'i, Moloka'i, and Maui, while they have volcanic origins, do not exhibit the same level of activity as Hawai'i. Kaua'i, for example, features ancient volcanic mountains that have been eroded over time, and while Moloka'i has volcanic features, it is not actively erupting. Maui does contain the dormant volcano Haleakalā, but it is not currently active. Therefore, Hawai'i stands out as the island most associated with significant volcanic activity, particularly in the context of contemporary eruptions.