A unit of distance is a standard measurement used to quantify the length or space between two points. The SI (International System of Units) unit of distance is the meter (m). Other common units of distance include kilometer (km), centimeter (cm), inch (in), yard (yd), mile (mi), and light-year, among others. So, any of these—meter, kilometer, mile, inch, yard, or light-year—can be considered units of distance depending on the context. If the question refers to options, the correct choice for a unit of distance could be any of these typical units (e.g., meter or light-year) while units like newton, watt, or joule are not units of distance as they measure force, power, or energy respectively.
