Speed
Volcano Wins
Sloth
The three-toed sloth has elevated slowness to an art form, traversing the canopy at speeds that would test the patience of continental drift itself. With a maximum velocity of 0.24 kilometres per hour, the sloth completes its daily activities in a timeframe that makes glacial movement appear positively hasty. This deliberate pace is not weakness but rather an exquisitely refined survival strategy, allowing the creature to avoid detection by eagles and jaguars whose hunting instincts are calibrated to respond to movement. The sloth's digestive system operates at a concordantly leisurely rate, requiring up to thirty days to process a single meal.
Volcano
The volcano represents velocity in its most catastrophic form. During eruption, magma can be expelled at speeds exceeding 200 metres per second, whilst pyroclastic flows race down slopes at velocities approaching 700 kilometres per hour. Volcanic lightning, generated by ash particle collision, strikes with the instantaneous fury common to all electrical discharge. The contrast with sloths could scarcely be more pronounced; what a sloth accomplishes in a month of deliberate movement, a volcanic eruption achieves in fractions of a second. This capacity for sudden, overwhelming speed makes volcanoes amongst the most feared geological phenomena on Earth.
VERDICT
Pyroclastic flows at 700 km/h versus 0.24 km/h of methodical arboreal locomotion represents an insurmountable velocity differential.