Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions
__________is the existence of a large number of different kinds of animals and plants which make a balanced environment
A. extinction
B. biodiversity
C. habitat
D. conservation
Đáp án : B
Biodiversity = sự đa đạng sinh học. extinction = sự tuyệt chủng. habitat = môi trường sống. Conservation = sự bảo tồn