In the wild you can use bone tools

Primitive Bone Tools
Bone Tools
Bone from the rib of a larger animal can be used to make arrow heads or even fish hooks. The shoulder blade can be serrated with your knife to make a saw.

Primitive Bone Tools
Bone Tools
Tools from bone can go a long way in helping you survive in the wilderness. Knowing how to make them is a very important part of bushcraft.
This on top of hunting and collecting your own meal and making fire under primitive conditions.
Check out the survival facts on how they intend to go about it.