Final answer:
Evidence for past volcanic eruptions at Yellowstone National Park includes lava flows, geysers, and hot springs, all resulting from the volcanic hotspot beneath it.
Step-by-step explanation:
All of the following pieces of evidence for a past volcanic eruption are present at Yellowstone National Park: lava flows, geysers, and hot springs. Yellowstone sits atop a volcanic hotspot where mantle plumes rise towards the surface, creating the potential for eruptions and various volcanic features. This geological activity is not a result of plate boundary interactions but from a hotspot beneath the North American Plate. The park's landscape is dotted with features such as the impressive Grand Prismatic Spring, trails of lava flows, spouting geysers like Old Faithful, and the terraces of Mammoth Hot Springs, showing ongoing volcanic activity. Additionally, extremophile organisms such as archaea thrive in the extreme conditions of the hot springs.