Answer:
Line S
Step-by-step explanation:
Because Line R and Line S don't meet and dont intersect.
I hope this helps! I'm sorry if it's wrong.
What are the clues fvfrce
You forgot too include the pictures
Answer:
Retainers have been designed to be used as an end of treatment to help retain your teeth in their new position. ... These are removable and fixed retainers. The reason why retainers can't be used to close a gap is because they are fitted at the end of treatment and are made to fit the straight teeth mould.
hope it help u
itz by Riddhi