I think it's the techtonic plates.
Answer:
(B) a descending convection current in the Earth's mantle
Explanation:
The connection between the sea floor and ocean produces a conventional current due to its waves
Answer
16
or 50.24 units
Explanation:

and r is the radius, since we know what the radius is (<em>r </em>) we can put this in to an expression
· 4² = 16 units
If the answer is not 16 then its 50.24 units
Explanation:
Now 16 is the correct answer but just in case I took this a step further.
If we estimate the area by using 3.14 which is (
) because sometimes that isn't natural to express the area using
I hope I helped you : )
Less Developed Country (LDC) or Less Economically Developed Country (LEDC)