How do you complete the 5th puzzle on Virtual Villagers?

I can't get what it is or how to get it.How do you complete the 5th puzzle on Virtual Villagers?
If you are playing virtual villagers 1, you have to take a builder up to the top left of the village and remove the creek blockage. I think you have to have at least level 2 in construction.



If you are playing vv2, you have to drag a villager to certain herbs and flowers on the island and let them study them until they understand them. There are 6 differet herbs and flowers that you have to study. They are all located around the edges of the village.



If you need any additional help you can check out ldw.com, they created the game and have great guides under their forum section.How do you complete the 5th puzzle on Virtual Villagers?
I can't remimber which one that is, I'm on V.V.2. but their are pretty good walkthroughs on www.gamefaqs.com

Good Luck!!