How do you design a guitar which can produce high pitch and will not break easily when it is strummed?

To design a guitar that produces high pitch while ensuring durability, use materials like spruce or cedar for the top, which are known for their resonant qualities that enhance treble frequencies. Reinforce the body with a well-constructed bracing pattern to withstand the tension of the strings and the force of strumming. Additionally, opt for high-quality, lightweight materials for the neck and back, such as mahogany or composite materials, which provide strength without compromising sound quality. Finally, selecting thinner gauge strings can help achieve higher pitches while reducing the risk of breakage.