Wood is not very durable because:

A. cold and heat distort it.
B. water rots it.
C. insects can eat it away.
D. All of these are the case.
E. None of these answers are correct.

D
As an organic material, however, wood is vulnerable—heat and cold can warp it, water can cause it to rot, fire will turn it to ash, and insects can eat away at it. Due to the nature of the material in durability, we must assume that only a small fraction of the wooden objects made over the centuries have survived.