I think it's agriculture.
Also, the Tiger is a brutal and fast fighter. The Tiger regularly takes on game that is far larger and stronger than the Lion and does such alone. The Lion requires the help of the pride to take out a large animal. When a Tiger fights, he fights to kill, not just to push aside someone and get better food
Hydrogen
Iron
Aluminum
Copper
Sodium
Carbon
Silver
Mercury
Gold
Lead
........