to evoke mood you can use many stargtegies such as pathetic fallacy and foreboding and foreshadowing
C.) to show objects that represent ideas beyond their literal meaning
An issue can be that people felt trapped by the society that only wanted conformity and did not support behaving in any way that was not considered the norm. That is the reason why Jekyll enjoyed being Hyde; as Hyde he could do whatever he felt and wanted and not be judged by the society.
