Aloudspeaker produces sound waves that change in wavelengths from 1.0 m to 1.5 m. if the wave speed is constant, how did the vibration of the loudspeaker change? explain

The only possible explanation is that the frequency of the emitted wave has changed.
In fact, wavelength  is related to the frequency f by:

where v is the speed of the wave. If v is constant and the wavelength has changed, then it means that f, the frequency, has also changed.

Texture and composition are different because they are not the same aspect. texture has to do with feel and so on, where as composition is the chemical makeup which you cant touch like you can texture.

The modern-day generator works on the principle of electromagnetic induction discovered by michael faraday in 1831-32. faraday discovered that the above flow of electric charges could be induced by moving an electrical conductor, such as a wire that contains electric charges, in a magnetic field.