What SI base unit would be used to describe the physical characteristics of dolphins?

The SI base unit that would be used to describe the physical characteristics of dolphins is the meter (m). This unit is used to measure length, height, and width, which are all important physical characteristics of dolphins. For example, the average length of a bottlenose dolphin is between 2 and 4 meters, while the average height of a bottlenose dolphin is between 1 and 1.5 meters.