I never read the book if ill be honest but the atmosphere seems correct my good sir
I would say the tone of this sentence is formal.
<span>Both thought that they had committed a moral and necessary act of defiance. </span>
Answer:
"Biodegradable” refers to the ability of things to get disintegrated (decomposed) by the action of micro-organisms such as bacteria or fungi biological (with or without oxygen) while getting assimilated into the natural environment."