Final answer:
In Adobe Illustrator, to create a gap in the vector shape of the letter O using a blue rectangle, one should use the Pathfinder > Minus Front function. This subtracts the rectangle from the letter O, creating the desired gap. The correct multiple-choice option is (a).
Step-by-step explanation:
The student's question pertains to modifying a vector graphic using Adobe Illustrator, specifically the vector that forms the letter O in the word Power. The process involves creating a gap in the vector shape of the letter O using another shape, in this case, a blue rectangle. To achieve this, the appropriate Adobe Illustrator function to use would be a) Pathfinder > Minus Front. This function allows you to place the blue rectangle over the part of the O where you want the gap, select both the letter O and the rectangle, and then apply the Minus Front command. This subtracts the top shape (the rectangle) from the shape below it (the letter O), thus creating a gap in the letter where the rectangle used to be. The correct multiple-choice option is (a).