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.

"throngs rushed to the coastal area near the airport from which the plane had taken off, overloaded with relief supplies clemente wanted to make sure reached the victims of an earthquake in nicaragua."

c is a symbol. when bernice gets her hair cut, it is the authors way of showing the affects and demands of pier pressure and the over-all attitudes of people at the time.