Where are most of the gas molecules in the atmosphere found?

mesosphere
thermosphere
troposphere
stratosphere

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?

The part of the eye that closes and opens to let light in is .

The table below shows the elements that mainly comprise each of the four layers of earth: elements in layers layer main elements crust oxygen, silicon mantle iron, magnesium outer core iron, nickel inner core iron which of these elements make up the layer that is 0.2 to 1.1 percent of earth's total diameter?