Answer:
Part to Whole
Explanation:
Greetings!
Ratios are very simple, if you need help with them at some point, message me!
Since Christian has 18 teeth in all, and 6 of them are tiger teeth, the correct ratio would be 6:18, which is the second response, part-to-whole.
If you want to go even further, you can simplify this ratio and make it smaller (simplify!)
You would get 1:3
Happy Learning!