The Gods were angry at the humans because, apart from their unacceptable behavior, they would also forget to pray to their names and honour them with sacrifices. That is why Zeus decided to destroy all humankind.
A phrase is a set of words that don't have a subject doing a verb.
A clause does have a subject doing a verb.
So therefore, 1 would be a phrase, 2 would be a subordinate clause, and I'm sure (or hope) you can figure out the rest..?
Number 1 is true. Number 2 is false. Number 3 is true
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