Example Question - proving parallel lines

Identifying the Correct Statement to Prove Parallel Lines in a Geometry Problem

\begin{align*} & \text{To prove that } \overline{ABCD} || \overline{EFG}, \\ & \text{the corresponding angles must be equal, i.e.,} \\ & \angle BFC = \angle GFC. \\ & \text{Thus, the correct statement is option (4).} \end{align*}