Question

Can someone check my answers!
A coordinate adjective is:
a pair of words that describe a noun <-- My answer
a group of words that joins other words and phrases
two words that are similar in meaning
a type of sentence that describes an event

Which of the following sentences contains a comma error?
With the moving van packed, my friend had to say goodbye.
The packages became too heavy for me, I dropped them. <---- My answer
Everyone, even our neighbors, came to our Super Bowl party.
My sweet, quiet father surprised us with his outburst yesterday.