To complete Puzzle #5: Unwanted Guest you must bake a fish pie to feed the bear. First drag a villager into the water of the southern shore so they catch the big bass that is jumping there. Then you must make dough, prep the oven, and drag a master farmer to the Crafting Hut for the dough. The master farmer will now make a pie. Bake the pie and then have a villager 'carefully' take it to the bear. The bear will will then leave.
Recipes for Dough:
Stone = Lava + Water
Flour = Wheat + Stone
Dough = Flour + Water
Check out our Puzzle #6: Flower Garden page to get the solution for the next puzzle.