Which of the following describes percussion idiophones?

Percussion idiophones are musical instruments that produce sound primarily by the instrument's own material vibrating, without the use of strings or membranes. They are typically struck, shaken, or scraped to create sound.

The correct answer involves the characteristic of being struck by mallets, which is one of the primary methods for playing idiophones. Instruments like xylophones, marimbas, and cymbals fall into this category, where the sound is generated through direct impact.

Other options do not align with the definition of percussion idiophones. For instance, played with a bow refers to chordophones, where sound is created by vibrating strings. Blown into to create sound describes aerophones, such as flutes or trumpets, which rely on airflow to produce sound. Shaken to produce sound can describe some idiophones but does not encompass the full range of idiophone characteristics as effectively as being struck. Therefore, focusing on striking is key to understanding the nature of percussion idiophones.