I think that PROCESSING is an example of secondary econmic
When winds move air masses, they carry their weather conditions (heat or cold, dry or moist) from the source region to a new region. When the air mass reaches a new region, it might clash with another air mass that has a different temperature and humidity. This can create a severe storm.
Answer: 
Explanation:
We need to know the volume of the cone that can be filled with bubble gum ball, but firstly we need to calculate the volume of the cone
and the volume of the buble gum ball (a sphere)
:
<u>Volume of the cone:</u>
(1)
Where:
is the radius of the cone
is the height of the cone
(2)
(3) This is the volume of the cone
<u>Volume of the gum ball:</u>
(4)
Where:
is the radius of the sphere (half the diameter)
(5)
(6) This is the volume of the gum ball
Know we are able to find the closest approximation of the volume of the cone that can be filled with bubble gum ball, by calculating the difference or substracting (6) from (3):
(7)
Finally:
(8)
I would put option A.
The question says how the surface MIGHT change over a long period of time so that's why I wouldn't say option C, and that's how canyons are formed if I'm not mistaken.
I hope this helps. My apologies if I'm wrong.