Final answer:
In the best-case scenario for a sorted list, Insertion Sort performs N-1 comparisons where N is the number of elements.
Step-by-step explanation:
If a list is already sorted, the number of comparisons that Insertion Sort will perform depends on the implementation, but in the best-case scenario, it will perform N-1 comparisons, where N is the number of elements in the list. This is because Insertion Sort compares each element with its predecessor and stops if it finds the predecessor is less than or equal to the current element. Since the list is already sorted, the first comparison for each element (except for the first one, which has no predecessor to compare with) will suffice, resulting in a single comparison for each subsequent element.