please help me to get the answers please its important

Answer:
(1) My favorite month is December, which is when my favorite holidays are celebrated.
(2) The adverbial clause is because.
(3) got
(4)
a the tag question is, right
b the tag question is, can you
Explanation:
you add the which to combine the sentences
because is a add on
got is past tense for get
hope this helps <3