User blog comment:Uselessguy/Guess Plants or Zombies in the whole series/@comment-25154254-20140914085948

QUESTION 3:

Why? Why they (1) are close by they (2) can't be?

Maybe because of different countries.

What are the four plants, two in "they (1)" and two in "they (2)"?

(Note: This question is a bit hard!)