Well here's an image of the things that do occur (different phases). You can see which ones are are right in the answer choices and pick out the wrong one. I hope this helps...
It has no effect. Density of a substance is the same no matter the size or shape of the sample.
Molecular structures of an object directly affect its physical properties (especially intensive features) such as color, density, melting and boiling points, malleability etcetera.
An example is a type of bond between the atoms and molecules in an object that influence its physical properties. Covalent bonds, for instance, render the strength of an object but deny it electric conductivity.
