\begin{tabular}{l} A farmer is painting a new barn. He will need to calculate the surface area of the barn to purchase the correct amount of paint. In which of the following units can the farmer expect to \\ calculate the surface area? \\ \( \mathrm{yd}^{2} \) \\ yd \\ m \\ \hline\end{tabular}

When calculating the surface area of the barn, the farmer can expect to use square units, such as \( \mathrm{yd}^{2} \). This is crucial because surface area measures the extent of a two-dimensional surface, so we need those square units to accurately reflect the amount of paint required to cover the entire area. Additionally, it's essential to remember that the farmer may also convert the measurements into different units based on the barn's dimensions—whether in yards or meters—so they can easily communicate with paint suppliers and ensure they have the right quantity for the job at hand!