Question

CPR is a good skill for anybody to have, __________if you want to babysit.

1.particule

2.particular

3.particularly

4.too particular

Answer 1

3. particularly is the answer

Answer 2

Hey there!
Your answer if 3) Particularly.
This is because it's saying that CPR is a good and effective skill to know, particularly(or especially) if you babysit. Particular and too particular wouldn't work because they're not grammatically correct and do not explain the circumstance in which having CPR as a skill would be effective well enough.
Hope this helps!