I think its B. Decrease cause If the Amount of greenhouse gases were reduced, then the temperature of the earth will cool
Answer:
8.60 g/cm³
Explanation:
In the lattice structure of iron, there are two atoms per unit cell. So:
where
an and A is the atomic mass of iron.
Therefore:

This implies that:

= 
Assuming that there is no phase change gives:

= 8.60 g/m³
The answer is (a) because movement is acceleration
I believe your answer is correct, because 8.7*10^-7 is equal to 0.00000085347.
Hope you do well!