Wednesday 5 Igneous rocks might show that
there once was near by.
A. oceans
B. volcanoes
C. swamps

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

4d^55s^1 ( third choice)

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but