Final answer:
When the formula =B1+B2 in E5 is copied down the column, the row numbers in the formula will change accordingly.
Step-by-step explanation:
When the formula =B1+B2 in E5 is copied down the column, the row numbers in the formula will change accordingly. So, the correct option would be option 2) The formula will change to =B3+B4 in E6. As we copy the formula down, the row numbers in the formula increment by 1, leading to the change in the formula itself.