D. Earthquake
This is because all the others are landforms.
it shoudl be : 2Fe(NO3)3 + 3MgSO4 → 3Mg(NO3)2 + Fe2(SO4)3
(the difference is Fe2(SO4)3 has no coefficient)
Liquid - takes the shape of the container and maintains volume
Solid- maintain shape
"H2" is the one among compound the following choices given in the question that is a molecule. The correct option among all the options that are given in the question is the third option or the penultimate option. The other options are all salts. I hope that this is the answer that you were looking for and the answer has actually come to your desired help.