Final answer:
The difference between strawberry balsamic and thousand island dressing is the fat used to produce them and emulsifying process. The difference between baby arugula and romaine is that one is a young sprout and the other is a full head.
Step-by-step explanation:
The correct way to complete the sentence to explain the difference between strawberry balsamic and thousand island dressing is the fat used to produce them and emulsifying process. This refers to the type of fat and the way the ingredients are combined to create the dressings. On the other hand, the difference between baby arugula and romaine is that one is a young sprout and the other is a full head. This refers to the stage of growth of these two types of lettuce.