Read the following passage and mark th...

Câu hỏi: Read the following passage and mark the letter A. B. C. or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.

A. The time required for species to adapt to new environments 

B. The variety of species found in tropical rainforests 

C. The impact of human activities on Earth's ecosystems 

D. The cause of the extinction of the dinosaurs