Answer:
1. Complex
2. complex sentence (This includes 3 clauses, the two first ones "Although..." and "they are..." are dependent clauses, "but..." is the independent clause.
3. simple sentence (there is one subjects in the sentence "Cooper and some other lacrosse players" and there is just one independent clause)
4. compound complex sentence (this sentence has subordinate clause "that has...", there are 2 independent clauses linked by "but")
5. complex sentence (this has the subordinate clause "we do for..." supporting the meaning for "what")
6. complex sentence (this has the subordinate clause "the grades..." supporting the meaning for "why")
7. compound sentence ( there are two independent clauses linked by "but")
8. complex sentence (there is two clause, "if..." is the dependent clause)
9. complex sentence (there is subordinate clause "that Louie survived" supporting the idea for "the prison")
10. Compound - complex (there is just one independent clause "you need to study more", the "If..." and "because..." are both dependent clauses)
11. Complex ("If you like...," - the dependent clause, "you will..." - independent clause)
12. Complex (This sentence has the subordinate clause "that used running...)
13. Complex sentence
14. Complex sentence (2 dependents clauses linked by "when")
15. Complex sentence