Answer: If you describe someone as nonchalant, you mean that they appear not to worry or care about things and that they seem very calm.
Explanation:
A discrete quantity of energy proportional in magnitude to the frequency of the radiation it represents
D: <span>The author believed the tree had a life story, like a person.
The author spends the first bit of the paragraph discussing how important "place" or, setting, is to make a story enjoyable. Then he describes his biography of the tree. It is clear that he considers the tree to have a character and story of its own when he says "</span><span>It is, in truth, another form of character".</span>