The answer can be more than one choice
which of these storylines can be categorized as science fiction?
a. a man tries to trace his birth parents and learn more about his family.
b. a narrator describes her experiences traveling to a distant planet.
c. a passenger recounts his voyage on board the titanic and how he survived its sinking.
d. a woman invents a machine that allows her to pass through solid objects.

The answers are B and D: A narrator describes her experiences traveling to a distant planet; a woman invents a machine that allows her to pass through solid objects.

Science fiction is a literary genre that explores fictional inventions and technology in conjunction with social scenarios of a utopian or dystopian nature proposing, more often than not in an implied manner, a critique of actual and current situations and scenarios and their impact on today´s society. The works of Kurt Vonnegut, the 20th century American writer, are a good example of this.

i think its a.

an ugly duckling is teased by the other ducklings. when she grows up, however, the ducklings discover that she is a beautiful swan