A. Saving natural resources.
B. Cultivating rare plants.
C. Hunting for animal experts.
D. Protecting threatened species.
A. Ocean currents.
B. Climate disorder.
C. Human being.
D. Natural disasters.
A. It has threatened the normal life of other animals.
B. It's an example of victims of habitat destruction.
C. It's the most special sea life in these two countries.
D. It has totally disappeared from these two countries.
A. Species protection methods are effective.
B. More people are changing their behavior.
C. New energy substitutes are found for future use.
D. The whole population of birds is increasing.