To justify the SAS (Side-Angle-Side) Congruence Theorem, you need to establish that two triangles have two pairs of corresponding sides that are congruent and the angle between those sides is also congruent.
Looking at your options, the response that directly uses two sides and the included angle between them is:
"An illustration shows two triangles side by side. The two triangles are labeled E F G and H I J. Side F G is congruent to side I J. Side E F is congruent to side H I. Angle E is congruent to angle H."
This option meets the criteria for the SAS theorem: it states that two sides (EF and HI, FG and IJ) are congruent, and it includes the angle between those two sides (angle E and angle H) as congruent.
Thus, this is the pair of triangles that justifies the SAS Congruence Theorem.