Which process limits the eruption intensity at shield volcanoes?

💡 Explanation

Low-silica magma allows dissolved gases to escape more easily via the mechanism of effusive eruption, because the lower viscosity prevents pressure build-up; therefore, eruptions are less explosive with less volcanic intensity, rather than high silica lavas which cause explosive eruptions that builds pressure significantly.

• Which risk increases when construction restricts seasonal overflow on an alluvial fan?
• Which process creates natural levees alongside a river experiencing meander cut-off, where an oxbow lake forms?
• Which mechanism exacerbates flood risk when levees fail?
• Which mechanism results from differential slip rates along transform faults?
• Which mechanism restricts magma ascent during subduction beneath continental crust composed largely of felsic rock?
• Which process limits surface nitrate replenishment within subtropical gyres?