Riddle

Stone inside a tree, helps words live; stand still and have less the more I move.

Choose an answer

A.A ballpoint pen
B.A paintbrush
C.A crayon
D.A pencil
Hint: It's a 2-word phrase with 7 letters, starting with "A".

Answer

A pencil

Why this is the answer

A pencil contains graphite ('lead' from a mine) encased in wood (from a tree). It gets shorter as you use it.

This riddle is filed under Expert Riddles for Adults and rated Hard.