Answer:
b) electrons are shared in a covalent bond
Step-by-step explanation:
remember for ionic bonding, it occurs between a metal and a non-metal, we know that the metal donates electrons to the non-metal while the non-metal is the receiver.
the reason why the metal donates electron is usually because it has between 1-3 electrons on its valence shell and therefore there is a weaker attraction of the positive nucleus to the outermost electrons hence why it is readily donated.
the opposite occurs for the non-metals hence why it readily accepts electrons to become stable