Final answer:
Insulation is a material's ability to resist heat flow. It acts as a barrier to slow down or stop the flow of heat.
Step-by-step explanation:
The material's ability to resist heat flow is called insulation. Insulation is the property of materials that prevents the transfer of heat between two objects of different temperatures. It acts as a barrier to slow down or stop the flow of heat through conduction, convection, and radiation.
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