Answer:
Victor was accused of the murder because witnesses seen a single man in a boat leaving the scene. The boat resembles the one that Victor arrived in.
Explanation:
Desserts, sugar, and pilgrims are all common nouns.
Nouns that aren't common nouns are called "proper nouns." These are words such as names. "Thanksgiving" is a proper noun because it's a name of a holiday.
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).