What type of bonds are shown in this diagram?

A diagram shows a number of circles, each marked with a ‘+,’ surrounded by a number of smaller, blue balls. Arrows seem to indicate that the blue balls are moving around and between the circles. A key at the bottom of the illustration shows the circles with the plus signs are metal ions and the blue balls are electrons.

(1 point)
Responses

metallic bonds
metallic bonds

ionic bonds
ionic bonds

hydrogen bonds
hydrogen bonds

covalent bonds

covalent bonds

Based on the given diagram and key, the type of bonds shown in the diagram are metallic bonds.