All of these are associated with what great inventor?

This question is incomplete, here´s the complete question.

Microphone, motion-picture camera, and motion-picture camera.

All of these are associated with what great inventor?

Thomas Alva Edison

Explanation:

Edison´s was one of the world's most prolific inventors, and some of his designs were fundamental to the development of sound His Carbon Microphone (1877-78) helped further develope Graham Bell´s telephone. And his Kinetoscope, Kinetograph and Kinetophone (1888-1890s), developed with his assistant William Dickson, allowed to watch and record motion pictures.

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