Read the excerpt from a short story. The young docent welcomed the class to the museum, explaining that the east wing was under construction and he’d be leading them to the first exhibit. His fingers leapt to his name tag as he nervously introduced himself as “Liam, a student of the arts.” Then he bade the group follow him. They traversed a vaulted hall lined with hulking objects, each one obscured by a faded tarpaulin. Some of the items stretched across the floor, others cast long shadows on the museum walls.
What technique does the author use to build suspense in the excerpt?
darkening the word choice
quickening the pace of the story
intentionally omitting setting details
making the outcome of events uncertain

as you read the passage below, consider how dana gioia uses

evidence, such as facts or examples, to support claims.

reasoning to develop ideas and to connect claims and evidence.

stylistic or persuasive elements, such as word choice or appeals to emotion, to add power to the ideas expressed.

explanation:

21 balloons is the story of professor william sherman's travels.

in 1883, he set off from san francisco for a balloon ride over the pacific and was found a month later floating with 21 balloons in the atlantic ocean. this seemed an astounding feat and everyone wanted to know what had happened.    

professor sherman was loyal, however, and said he would tell his tale first to the western american explorers club in san francisco, of which he was a member. this built up suspense for several chapters before he began to tell of the wonders of his adventures and the amazing island of krakatoa, an island which had just been blown up by a volcano.  

the residents of krakatoa are all millionaires who live under a "gourmet government" of their own devising. we get to see all the incredible adventures that creative people with unlimited resources would create according to the author.