Many scientific theories that are mentioned in the novel have been applied in real life. For example, Galvani proved that stimulation of a frog's nerve causes contraction of the muscle to which it is attached. This was proven in 1791. Because of this discovery, there was extensive research and excitement throughout the European nation on the application of electricity to sustain human life.
Answer:
<u>THIS</u> sentence (the sentence that you provided) has a verb in the passive voice:
Based on his cell phone records, it <em><u>was believed</u></em> to be in the area.
Explanation:
Start a fire. It sets the entire island on fire and puts them in danger. As far as irony goes, fire is a symbol of hope in the novel, so it is ironic that hope is the thing that would destroy them (if they were not found just in time).