“The Lagoon” is actually a short story that was written by the author Joseph Conrad, and based on this story, the event that causes Arsat to shiver is that it has gotten cold and Diamelen has died. The answer to this would be the first option. Hope this helps.
Which event causes Arsat to shiver in “The Lagoon” by Joseph Conrad? It has become cold and Diamelen has died. The white man has reminded him of death. His guilt over his brother has distressed him. The mist is rising and the boatmen are singing.