Answer:
B. to comment about an issue facing society
Step-by-step explanation:
It is likely that an author chooses a particular theme in order to comment on an issue facing society or to explore their own creativity. Themes can be used to introduce elements of mystery and surprise, but they can also be used to explore deeper ideas and issues that the author finds interesting or important. An author may also choose a particular theme in order to reflect on their own life experiences, but this is not always the case. Ultimately, the reason an author chooses a particular theme will depend on their individual motivations and goals.