The correct response is: Figure 1 and Figure 2; the side lengths are proportional and corresponding angles are equal.
Figures are similar if their corresponding angles are equal and the lengths of their corresponding sides are proportional. If Figures 1 and 2 meet these criteria, they are similar regardless of the size of the figures or whether they are rectangles.
The other options either incorrectly describe the relationships between figures or do not include all necessary conditions for similarity.