Australia is the home of 95 percent of the world's diamond opal or ruby supply.

places of higher salinity. there are parts of the ocean where hardly any rain falls but warm dry winds cause lots of evaporation. this evaporation removes water – when water vapour rises into the atmosphere, it leaves the salt behind, so the salinity of the seawater increases. this causes the seawater to become denser.

i have no idea oh hey

the answer is the last option or letter d)