Ummm I’m not sure let me do the work
Answer:
Od- Wooden
Explanation:
It would not make sense if it was non-wood because that make it no a wood base product, OC is not right because its not a a plant that produces wood as its structural tissue and thus has a hard stem. An OA justT o take or get a supply of wood. so its Od
A, b, d, c, c, d, a, b, c, b, ultrasound, sound, sonar, harmonics, vibration, true, false, false, true, true