Final answer:
Tessa is making bigger cookies than Logan because her scoops are larger in size.
Step-by-step explanation:
To determine who is making bigger cookies, we need to compare the sizes of the scoops used by Logan and Tessa.
Logan uses 1.25-ounce scoops, while Tessa uses 1.5-ounce scoops.
Therefore, Tessa is making bigger cookies because her scoops are larger in size.