The theme of young goodman brown is

The weakness of public morality

Explanation:

The story "Young Goodman Brown" deals with the theme of public morality. This story takes place in a context that is particularly conservative about its moral code. It is also a community where people feel proud of the town's reputation and behaviour. This is the Puritan community of Salem. However, when young Goodman Brown decides to explore the decadent and immoral side of the town, he discovers that it is all appearances, and that in fact, everyone in the town is equally decadent and sinful.

hello,

your answer is a) the metaphor suggests that the poetic themes are serious and dark.

collins is comparing the poem to a dark room. he is suggesting that the poems theme is serious and wants you to understand it. you don't need to understand the poet in order to understand the poem. you also don't need to move around while reading it. he is simply saying the poem has a dark and serious theme.

- i.a -