Questions

Rainfall and addition of fresh water from rivers reduce salinity neat the coasts.

A tone in music is a sound that has definite pitch. Pitch is nothing but the relative highness or lowness of a sound.

The 2nd largest consumer and importer of the LPG in the worldis India.

Polyunsaturated fats are healthy fats whcih we can get from eating greeny leaf vegetables, fish and some seeds that are helpful in brain functioning, nutrient rich blood, hair growth, etc...

Arteries carry oxygenated blood away from the heart to the tissues, except for pulmonary arteries, which carry blood to the lungs for oxygenation (usually veins carry deoxygenated blood to the heart but the pulmonary veins carry oxygenated blood as well).

Deficiency of Iodine cause Goiter also called Enlarged Thyroid. It doesn't give any pain but difficult to swallow and breath are its causes.