The correct option is B Sea
Seawater is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of approximately 3.5% or 35 parts per thousand. This means that for every 1 litre (1000 mL) of seawater there are 35 grams of salts dissolved in it. But water used by us for our daily purposes is not salty. It is known as fresh water. Water in ponds, puddles, river, from tube-wells and our taps at home, is usually fresh water.