* Salts are ionic compounds formed by the reaction of an acid and a base. They typically consist of a positively charged cation (metal or ammonium ion) and a negatively charged anion (non-metal or polyatomic ion).

Let's analyze each compound:

* CH4 (Methane): This is a covalent compound (carbon and hydrogen share electrons) and not a salt.

* NaF (Sodium fluoride): This is a salt. It's formed from the reaction of sodium hydroxide (NaOH, a base) and hydrofluoric acid (HF, an acid).

* NaOH (Sodium hydroxide): This is a strong base, not a salt.

* BaSO4 (Barium sulfate): This is a salt. It's formed from the reaction of barium hydroxide (Ba(OH)2, a base) and sulfuric acid (H2SO4, an acid).

* NH3 (Ammonia): This is a weak base, not a salt.

* KBr (Potassium bromide): This is a salt. It's formed from the reaction of potassium hydroxide (KOH, a base) and hydrobromic acid (HBr, an acid).

* HNO3 (Nitric acid): This is a strong acid, not a salt.

Therefore, the salts from the list are: NaF, BaSO4, and KBr.