If you are out hiking and you get lost or hurt, it is always useful to know how to make things for survival. If you can obtain food, then you are half way there to survival. The other half is attaining water and purifying it. But let’s just look at making a bow and arrow if you were stranded out in the middle of no where and you needed to get food.
When you realize that literally any wood will make a bow, it frees up the possibilities. Pick the straightest, tallest, knot free section as possible.
Here’s a video to aid you in your making of a bow and arrow: