The dimensions of the floor in the family room are 4 meters by 6 meters. which is the correct unit of measurement to use when figuring out how much tile is needed to cover the floor of the family room? a. m b. m² c. m³

The floor of the family room is an area, with a length and width. The measurement of an area would be __^2, in this case m^2.

Additionally, you can think about it in the form of multiplying your units:
6 m in length x 4 m in width is the area

6 m x 4 m = 6 x 4 x m x m = 24m^2
In this case, the unit is m^2.