ANSWER:
The cash crop which is not grown in the high islands of Melanesia and Polynesia is kiwifruits.
Step-by-step explanation:
- All the other options, rubber, coffee and sugarcane are the major cash crops that have the huge economy of Melanesia and Polynesia.
- Kiwi fruit is the type of cash crops grown in the sloppy and hilly areas with abundant water facility.
- These fruits are native to china and are also known as Chinese gooseberry.
- The high island of Melanesia and Polynesia lacks the cultivation of kiwifruits as a cash crop due to several reasons.