What generates ocean tides on Earth? winds and ocean currents

the rotation of the Earth on its axis

alignment of the Earth with the Moon and Sun

the Coriolis effect

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world

Iwould appreciate if someone could me.

One similarity and one difference between an element and a mixture of elements