Choose the two sentences that explain what Thor Heyerdahl was hoping to prove on a voyage to Polynesia.
1. Thor Heyerdahl was a Norwegian explorer and a man who liked adventures.
2. He had a theory that ancient people from South America had once sailed way across the Pacific Ocean to Polynesia.
3. Such voyages would explain a very curious fact: plants such as the sweet potato and the bottle gourd have grown in Polynesia since prehistoric times but are native to the Americas.
4. The experts told Heyerdahl he was crazy.
5. But Heyerdahl was stubborn.
The two sentences that explain what Thor Heyerdahl was hoping to prove on his voyage to Polynesia are:
2. He had a theory that ancient people from South America had once sailed way across the Pacific Ocean to Polynesia.
3. Such voyages would explain a very curious fact: plants such as the sweet potato and the bottle gourd have grown in Polynesia since prehistoric times but are native to the Americas.
Explanation: Sentence 2 outlines Heyerdahl’s theory about ancient migrations from South America to Polynesia, while sentence 3 provides evidence supporting this theory by mentioning the presence of American-native plants in Polynesia. This context is crucial to understanding his motivation for the voyage.