What characteristics differentiate troposphere from other layers of
atmosphere?
I. It is where most water vapor is found.
II. It begins about 16 km above the Earth's surface.
III. It is where all weather phenomena virtually takes place.
IV. It is where temperature decreases with altitude at 2° C/ km



a. I and III only
b. I, II and III
c. ll and Ill only
d. I, II, III and IV