Final answer:
Length, mass, time, and electric current are fundamental physical quantities measured in meters, kilograms, seconds, and amperes, respectively. All other physical quantities are derived from these base units.
Step-by-step explanation:
The fundamental physical quantities combined to give the physical quantities denoted length, mass, time, and electric current are the base units of the metric system. These quantities are intrinsic to the natural world and are defined only by the procedures used to measure them. The fundamental units specific to these quantities are the meter (m) for length, kilogram (kg) for mass, second (s) for time, and ampere (A) for electric current. All other physical quantities, such as force and speed, are derived units that are expressed as algebraic combinations of length, mass, time, and electric current (for example, speed is length divided by time).