1. Coconut palm
2. Coconut palm heartwood
3. Coconut palm seeds
4. Coconut fibre
You are definitely working hard on winning the prize, huh...???
Well, I don't blame you and would be the first time for you so, double bonus there but, you need to look into names these products are sold to, in Australia.
If you know what each part is, the rest would be easy but, and from what I see from your answers, you have not yet made your mind on what each material is and some of your guesses are incorrect.
There has been also other members that mentioned the Palm heartwood or body, that would be incorrect, Palm tree as no heartwood or sapwood, it has a skin that can be called bark, the inside is all of the same material that looks quite different than any of the materials used in the blanks of mine.
I see your frustration but, I can go any further, what I said here, may be sufficient to other members to work it out so, the hints are for anyone that reads this thread/post.
Cheers
George