At 3rd level, you adopt a style of fighting as your specialty. Choose one of the following options. You can't take a Fighting Style option more than once, even if something in the game lets you choose again.
Dueling
When you are wielding a melee weapon in one hand and no other weapons, you gain a +2 bonus to damage rolls with that weapon.
Two-Weapon Fighting
When you engage in two-weapon fighting, you can add your ability modifier to the damage of the second attack.