Write the letter of the best answer.
2. Which kind of ecosystem has the greatest biodiversity? 1. desert 2. grassland 3. rain forest
3. The most diverse ecosystems are found 1. in the water 2. along the elevator 3. in North America
4. Endangered species have 1. stable population sizes 2. large population sizes 3. small population sizes
5. Introduced species have no . 1. way to reproduce 2. natural predators 3. value
6. Biodiversity can be protected by . 1. preserving ecosystems 2. eliminating habitats 3. cutting forests