Why does diamond have such a high thermal (heat) conductivity?

Question

Please explain in relation to its structure

Answer 1

For diamond, its structure is macromolecule, in other words, there are many atoms which are strongly covalently bonded together.As a result, it require alot of heat to break the intermolecular force between them, thus diamond has high thermal heat conductivity and also has high melting and boiling point.