Darkness settles on roofs and walls,
but the sea, the sea in darkness calls;
the imagery in these lines evokes a sense of
a laziness.
b fear.
c mystery.
d despair.

I believe the answer is: Mystery

A sense of mystery tend to be created when the situation presented in the writing seem uncertain and difficult to explain.

The use of the word darkness in both lines depict something that couldn't be easily seen/noticed and yet the usage of the words 'settles' and 'calls' means that the speaker is sure that something exist in the darkness.

shakespeare was famous for writing in iambic pentameter, which is a specific way of rhyming sonnet lines in ten syllables. there are also forms of unrhymed iambic pentameter, as in macbeth, with the noble characters.

brazil   is on the caost