Metallic bonds are responsible for many properties of metals, such as conductivity. Why is this possible?

Question

1) An attraction between a positive charge and a negative charge is created.
2) Two metals bonded together are going to be more conductive than a metal bonded with a nonmetal.
3 )Metals have low electronegativity, so they are conductive because they pass charges easily.
4) The bonds can shift because valence electrons are held loosely and move freely.

Answer 1

4) The bonds can shift because valence electrons are held loosely and move freely.