S1. The snowy albatross is among the largest birds that fly in the world. S2. It has the widest wingspan among all birds, with lengths reaching up to 12 feet. The second statement:

Statement S1 establishes that the snowy albatross is among the largest flying birds. Statement S2 provides a specific supporting fact—it has the widest wingspan among all birds, reaching up to 12 feet—which strengthens and adds detail to the claim in S1. This is not contradiction or contrast. 'Confirms' would imply S2 proves S1, but a single attribute (wingspan) does not fully prove being 'among the largest'. 'Reinforces' is more apt because S2 strengthens S1 by providing additional supporting evidence. Hence, option (d) is correct.