Rough is a property. A rough material feels scratchy when you touch it.
Look at each picture, one at a time. Imagine touching the material shown in each picture.
Of the choices, the bark is the roughest. If you could touch this tree bark, it would feel scratchy.
remember
Every object is made of one or more materials. A material is a type of matter. Wood, glass, metal, and plastic are common materials. A material has different properties. A material's properties tell you how it looks, feels, tastes, or smells.
