It takes resources when there are more animals it takes more food then when you run out of food you will have to buy more which you will run out of money its all about money without money animals will starve.
Your answer is takes resources.
Joints in both the skull and in the elbow move. however if you break a join in your elbow you will most likely survinve. if you break one in your skull you have a higher chance of death then you would if it had been your elbow.
sorry for my bad handwriting lol-
17.1 percent of NFL players
16 percent of NBA players
29.6 percent of MLB players
20.2 percent of NHL players