Answer:
Most likely D since you want to know the parts of the human brain right? and when searching stuff up in a search engine with google you have to be specific because it just looks for the key words.
Explanation:
There are multiple words to describe a character that is never developed by the author. A flat character, for example, is a character that is only defined by one or two traits and nothing else. However, in this case, I think the answer would most likely be a static character, which is a character with little to no development so as not to take away from the story being told.
Go to a nasa website and search climate change