Which variable affects the natural frequency of an organ pipe? pipe use pipe area pipe width pipe length

The natural frequency of an organ pipe is primarily affected by the pipe length. The length of the pipe determines the wavelength of the sound wave produced, which in turn affects the natural frequency. Longer pipes produce lower frequencies, while shorter pipes produce higher frequencies. The other options, such as pipe use, pipe area, and pipe width, do not directly affect the natural frequency of an organ pipe.