Transition metals have delocalized electrons called an "electron sea." What property does this allow?

A. Conducting electricty

B. Brittleness

C. Forming multiple bonds

D. Flammability

A conducting electricity

Explanation:

The "electron sea" allows the current to flow across the electrons. If the electrons were stuck in their positions, these metals would be better insulators than conductors because they couldn't spread (or conduct) the energy as electricity.

B, C, and D are all not things directly caused by the delocalized electrons.