The International System of Units (SI) defines seven base units that are indivisible and not derived from each other. One of these base units is the unit of mass.
The correct SI base unit for mass is the kilogram. Among the options provided:
- Meter is the SI base unit for length.
- Pound is not an SI unit; it is a unit of mass in the imperial system.
- Gram is a part of the SI system for mass but it is not the base unit. The kilogram is the base unit, and a gram is 1/1000th of a kilogram.
- Foot is also not an SI unit; it is a unit of length in the imperial system.
Therefore, the correct SI base unit for mass listed in the options is "gram" because it is part of the metric system even though it is not the base unit, and it seems that the correct base unit "kilogram" is not included in the options. If "kilogram" were an option, it would be the correct answer. However, in absence of "kilogram," "gram" is the closest correct option provided.
