Correct Answer: sawdust is a poor conductor of heat

Solution : The correct answer is sawdust is a poor conductor of heat.

Heat conducts poorly through the sawdust. Heat is insulated by the air that is present in sawdust's tiny pores. This air prevents heat from the environment from reaching the ice, preventing the melting of the ice. Sawdust is used to pack ice because it slows the melting process. Air and wood shavings combine to form sawdust. Both wood and air are poor heat conductors.