See the answer
a.
it is the closest layer to the earth's surface

b.
temperature is decreasing with altitude

c.
is the layer in which most weather takes place

d.
a, b, and c are correct

e.
none of these are correct

most of the people in the world use which temperature measurement scale:

a.
kelvin

b.
fahrenheit

c.
celsius

d.
global scale

e.
none of the above is correct