Question

What four elements composed everything in nature according to the beliefs of the ancient greeks? air, earth, fire, and water air, ashes, fire, and water air, earth, salt, and water smoke, earth, fire, and water none of the above?

Answer 1

According to the beliefs of the ancient Greeks the four elements composing everything in nature are; the air, earth, fire and water. 
For example according to the Greek philosopher Aristotle in 350 BC, the five basic elements that composed everything in nature is air, earth, fire, water and ether. Additionally according to Greek philosopher Empedocles in 450 BC, the four basic elements that composed everything in nature are the air, fire water and earth. 

Answer 2

The ancient Greeks, in a theory that was suggested around 450 BC, believed that everything was from from four elements. These elements included earth, water, air and fire. Later, Aristotle supported this theory.

Therefore, the first option is correct.