You might want to make your titles less click-baity if you want to have discussions about things. Like, how about "What materials will we use to make bows and arrows?" This will help people search for topics later on down the road.
But to add to the discussion, I think materials used will depend on the biome. Flax might be used for bowstrings in one biome while hemp is used in another. Up north, maybe they use sinew from dryas elk. One biome may use beeswax and another resin from a tree.