Which of the following is a common outdoor activity available in Hawaii?

Dolphin swims are a common outdoor activity available in Hawaii, offering visitors the unique opportunity to interact with these intelligent marine mammals in their natural environment. The warm, clear waters surrounding the islands provide the perfect setting for such activities, allowing for unforgettable experiences in both guided tours and swim programs.

In many locations around Hawaii, such as Oahu and the Big Island, wildlife encounters, including dolphin swims, are integral parts of marine ecotourism, promoting both conservation and education about the local ecosystem. This immersive experience is particularly appealing to tourists seeking to connect with Hawaii's natural beauty and marine life.

In contrast, the other activities listed are not typically associated with Hawaii’s outdoor offerings. Indoor rock climbing is mostly an indoor activity and does not resonate with the island’s emphasis on outdoor adventures. Ice skating and snowboarding are activities more suited for colder climates, as Hawaii's tropical environment lacks the necessary conditions for snow or ice sports. Thus, dolphin swims stand out as a quintessential Hawaiian experience celebrating the region's rich marine biodiversity.