"As Salva watched, one of the men aimed his gun at Uncle. Three shots rang out. Then the men ran away" (Park 63).
"With their high singing whine constantly in his ears, Salva slapped and waved at them in frustration all night long" (Park 50).
"There were no mangoes among the fishermen's great stores, but sucking on his piece of sugar cane reminded Salva of those happier times" (Park 48/49).
Uncle is tied up to the tree and the group has been robbed. Terrorists are aiming at Uncle. Salva is scared. This is an external (Man Vs. Man) conflict because Uncle was going against the terrorists.
The mosquitoes rose from the water and went to bite all the travelers. This is an external (Man Vs. Nature) conflict because Salva is "fighting" the mosquitoes. He isn't going against himself or another person.
Salva is thinking back to the times his father would ride his bike to get mangoes and how good the mangoes were. This is because of the sugar cane. This is an internal conflict because Salva is thinking back to when his father bought mangoes. Salva misses his family.