Answer: B) metal ions floating in a sea of electrons
Explanation: Metallic bonding is type of bonding which are present in the metals . It is kind of electrostatic attraction between the electrons and the positively charged metal.
Thus Metallic bonding is the not the one in which the valence electrons are rigidly held neither the pattern in which the electrons are arranged in the regular repeating pattern nor the strong electromagnetic forces which are holding the electrons together in a place.
It is that chemical bonding which is present in metals and which hold the atoms together.