I. Choose the vowel sound for each of the words below.

II.Fill in each blank with one appropriate word from the box.

1. She has been interested in working with orphans and_ children.

2.   is the most important cause of freshwater turtle extinctions.

3. Many more species potentially will become , without gaining public notice.

4.   is the variety of plant and animal species present in the natural environment.

5. They developed programs aimed at protecting threatened and endangered species.

6. A    is the natural environment in which an organism lives.

7. A number of wildlife have been established to preserve endangered species from extinction.

8.   is the act of cutting down or burning the trees in an area.

9. The main objective of our program is to raise on biodiversity conservation to students.

10. When food becomes , it has the potential to make you sick.