Sis forSalt
Salt is a mineral that is essential to all animal life, but is toxic to most land plants. Salt is found in the sea, in your blood and sweat and in solid form as rock salt away from the sea.
Salt is collected to use for making food either by mining a deposit of rock salt, or by evaporating salty water until only the salt is left behind.
The photo is of the surface of a salt lake with piles of salt scraped into mounds, ready to take away.