What does the passage mainly discuss? A. The cause of the extinction of the dinosaurs B. The variety of species found in tropical rain forests C. The time required for species to adapt to
What does the passage mainly discuss?
A. The cause of the extinction of the dinosaurs
B. The variety of species found in tropical rain forests
C. The time required for species to adapt to new environments
D. The impact of human activities on Earth‟s ecosystems