Final answer:
Insulation boards are typically made from materials like polystyrene foam, fiberglass, wool, and goosedown feathers, thanks to their air pocket composition that provides excellent insulation due to air's poor thermal conductivity. Out of the options listed, Homasote is used for insulation.
Step-by-step explanation:
Common materials used as insulation boards include polystyrene foam, fiberglass, wool, and goosedown feathers. These materials are effective insulators because they contain numerous small pockets of air. Air has poor thermal conductivity, which makes it an excellent insulator. When dealing with the choices provided a) Syrocowood, b) Homasote, c) Masonite, d) Medium density fiberboard, most of these are not standard insulation materials. Among those listed, Homasote can be used for insulation purposes. It is a cellulose-based fiber wallboard that has some insulating properties and is often used in construction for soundproofing as well.