What is propaganda?
a-distributing information in simple language to aid the spread of health practices such as a vaccination for public safety
b-distributing information in simple language to increase literacy among the most disadvantaged citizens
c-distributing information, ideas, or rumors in order to or harm a person, institution, or nation
d-distributing information or ideas by government agencies to aid public awareness of government policies

id say it means hes fearful and/or cautious

have a good day

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 -