Write a letter to your mother telling here relationship between you and your friend has become sour
and asking her to settle the difference between you and
your friend.​

Quarantine has sort of revealed what type of friend my bsf is. So I'd ask my mom what to do

Explanation:

what do you need

explanation:

i don't understand

it is the background information on the characters and setting explained at the beginning of the story. the exposition will often have information about events that happened before the story began. the exposition is often the very first part of the plot.