What is the SI base unit used to measure the amount of a substance? Kelvin Kilogram Meter Mole

The SI base unit used to measure the amount of a substance is the mole. The mole is the standard unit of measurement for the amount of substance in the International System of Units (SI). It is defined as the amount of any chemical substance that contains as many representative particles as there are atoms in exactly 12 grams of carbon-12. The representative particles can be atoms, molecules, ions, or electrons. The other options, Kelvin, Kilogram, and Meter, are SI base units used to measure temperature, mass, and length, respectively, but not the amount of a substance.