Answer:
Square root means what number is multiplied by itself to get the radicand which is the number under the radical symbol (the check mark looking thing)
Explanation:
Your options are 3, 12, 11, 6
3*3=9
12*12=144
11*11=121
6*6=36
So 3 is the square root of 9, 12 is the square root of 144, 11 is the square root of 121, and 6 is the square root of 36