which of these instruments does not share many of the features of the modern piano? clavichord dulcimer lyre

Brief Explanations:

The clavichord and dulcimer have some similarities to the piano as string - struck keyboard instruments. The lyre is a stringed instrument but is a plucked string instrument and has a very different structure and playing mechanism from the modern piano which is a keyboard - operated, string - struck instrument.

Answer:

C. Lyre