The correct options are; IRON, SUGAR, GLASS AND NEON GAS.
In science, matter is defined as anything that has weight and occupy space. Matters can exist as solids,liquids or gases and they can change from one state to another state. Matters also usually have physical and chemical properties. Looking at the options given above, it will be noted that idea and sound are abstract substances, which can not been seen or touched. Thus, they do not qualify as matter.
