Final answer:
An effusive eruptive style leads to gentle lava flows, while an explosive style results in ash clouds and pyroclastic flows.
Step-by-step explanation:
The question at hand requires us to choose the most likely eruptive style for volcanoes based on the given information. In the context of the material provided, volcanoes can either erupt in an effusive or explosive manner.
Effusive eruptions, like those in Hawaii, result from relatively low-viscosity magma and generally lead to gentle flows of lava draping the flanks of volcanoes. Conversely, explosive eruptions, which tend to result from higher viscosity magma, can produce extensive ash clouds and pyroclastic flows, as seen from the Cleveland Volcano in the Aleutian Islands and the historic eruption of Mount Vesuvius.