क्षोभमंडल (troposphere) में हवा की गति मुख्य रूप से निम्नलिखित में से किसके कारण होती है?

Among the following gases, which one has the lowest volume concentration in Earth's dry atmosphere?

Which type of radiation is primarily responsible for ionizing atmospheric gases in the Earth's ionosphere?

Which layer of the atmosphere contains the ozone layer that absorbs most of the Sun's harmful ultraviolet radiation?