Concept:Hardware refers to physical, tangible parts of a computer. Software is a set of instructions that cannot be touched.Explanation:Monitor is a hardware output device – it displays visuals and can be touched.Scanner is a hardware input device – it physically scans documents into digital form.Excel (Microsoft Excel) is a software application – it is a program, not a physical object.Printer is a hardware output device – it prints paper and is tangible.Thus, Excel is not hardware; it is software.Answer:Option 3 (Excel)