Answer:
3. A map of Alexander the Great's route and the site of the sugar cane discovery
5. A timeline showing when Darius I and Alexander the Great learned of sugar cane
Explanation:
The text features that would be most helpful to support the central idea of the passage are a map of Alexander the Great's route and the site of the sugar cane discovery and a timeline showing when Darius I and Alexander the Great learned of sugar cane.
The text tells us about how Alexander the Great discovered the sugar cane. In order to understand this properly, we need to know the route he took to the discovery site, and a map would be a great feature for that.
Before Alexander's discovery of the sugar cane, the Greeks already possessed knowledge about its existence thanks to Herodotus' books about emperor Darius I. A timeline would help the reader visualize the connection between these two periods related to the discovery of sugar cane.
