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..?
Answer:
yes
Explanation:
because helping the community is beneficial to everyone
Answer:
interbreeding because of natural selection
Explanation: