2) Zombies enjoy eating brains, since it is in humans. People claim that they eat us because we are easy to catch, but I disagree.

3) There is a lot of talk about a future zombie apocalypse, for they believe zombies are real. Since zombies are so real, where have they been hiding this whole time then?

Compound- complex sentences have both a compound sentence and a complex sentience together.

1) Scientist have never found any such thing as a zombie, nor have I. They are supposed to be real, that is, for fictional writers only.