Which best explains why the shape of a liquid can change?
the particles have just enough energy to move past each other.
the particles are charged.
the particles move at very high speeds at all times.
the particles are highly compressible.

The answer is A:  

The particles have just enough energy to move past each other.

answer///isobars;

no. bullets are macro objects. wave nature is for light waves, extremely tiny particles. if a light particle was the size of your finger, the bullet would be the size of the universe. so basically, that huge difference in size makes the wave nature of matter insignificant.