Match the vocabulary word with its meaning. Please match a number with a letter. 20 points

1. a group made up of sovereign states that remain associated with Great Britain
a. desertification
2. the transformation of land from green to desert
b. ecosystem
3. the plants and wildlife that make up a region
c. finite
4. having an end; opposite of infinite
d. invasive
5. advantageous or favorable toward something
e. Commonwealth
6. plants or animals introduced to an area that destroy or hinder indigenous species
f. conducive