Question

poachers in africa are killing large numbers of rhinos for their horns. rhinoceros horns, valued for use in traditional medicines in vietnam and china, can fetch as much as thirty - six thousand dollars a pound. officials have tried to protect the rhinos: they have created fenced areas for the animals, patrolled their habitats, and even tried removing their horns. despite these efforts, the number of rhinos in africa has been dwindling. one creative solution to the poaching problem is to remove the rhinos from africa altogether. ray dearlove, the founder of the australian rhino project, came up with a plan to relocate eighty rhinos to a safari park outside adelaide, australia, where a breeding herd can be established.
what is the main, or central, idea of the passage?
officials have tried to protect african rhinos from poachers by guarding their habitats and removing their horns, but their efforts have been largely unsuccessful.
because other attempts to protect african rhinos from poachers have failed, the australian rhino project is relocating the rhinos to australia.

Explanation:

The text discusses the problem of rhino poaching in Africa and the efforts to protect rhinos. The main idea is that the Australian Rhino Project is relocating rhinos to Australia as a creative solution to the poaching problem. This is because other attempts like guarding habitats and removing horns have been unsuccessful.

Answer:

The main idea of the passage is that the Australian Rhino Project is relocating rhinos to Australia as a creative solution to protect them from poachers since other protection methods (like guarding habitats and removing horns) have been largely unsuccessful.