Nanotechnology involves...

• A. The use of matter on an atomic, molecular, and supramolecular scale for industrial purposes.
• B. A technique for visualizing data
• C. A method of storing energy in nano-batteries
• D. A type of software for data encryption

Answer: (A)

Nanotechnology centers on manipulating matter at the nanoscale, roughly 1 to 100 nanometers, where materials often exhibit unique properties. By working at atomic, molecular, and supramolecular levels, scientists can design and create new materials and devices with industrially useful capabilities, which is exactly what this choice describes—the use of matter at those scales for practical applications.

Other options don’t fit because they refer to entirely different areas: visualizing data is about data representation, encryption software is about cybersecurity, and while energy storage at the nanoscale can be a research area within nanotechnology, the broad definition is about the scale and its industrial applications rather than a specific energy storage technology.