I'm not sure if Passive abilities work for this or not but just use your abilities in combat. This is easier to earn in a combat mission and not free roam. Press start then RB to go over to abilities. Unlock and equip 2 active abilities and use them. Read the description for them because some only work when aiming down the sight, or when an animal is jumping at you. Once you use the 2 active abilities once, then change them to 2 different active abilities and use those.