Answer:
The purpose of the bobbin is to hold the thread that is held below the needle. The thread from the bobbin goes up through the plate and connects with the top thread to create a sturdy stitch when the machine is in use.
This statement is an opinion as theres no way you can factually say one person is better than another and this opinion can also be biased as maybe mrs r has given the student easier work or something to change their opinion
Salty water
hope this helps