The correct answer is 3.

Solution:

We need to find the quotient when 18 is divided by 6.
18 ÷ 6 = ?
We use multiplication facts to find the quotient.
We find a number which when multiplied by 6 gives 18.
Using multiplication fact, we have:
6 × 3 = 18
By comparing this multiplication fact with the given division sentence, we have:
18 ÷ 6 = 3
So, the correct answer is 3.