To solve this problem, we need to determine the square root of 25.
- Step 1: The square root operation asks us to find a number that, when multiplied by itself, equals the given number, 25.
- Step 2: Consider what number times itself equals 25. We note that 5×5=25.
- Step 3: Thus, the square root of 25 is 5.
Therefore, the solution to the problem is 25=5.
The correct answer is choice 2: 5.