Questions 151~152 refer to the following passage.
The wide variety of species found on Earth plays a crucial role in sustaining manyaspects of our lives. They form a complex network of life that supports naturalsystems such as clean air and water, fertile soils, and a stable climate. Additionally,they provide us with food, medicines, materials, and millions of job opportunities.Moreover, they inspire us and make our lives more meaningful.
However, the current state of wildlife is in critical condition. The number of specieshas declined by over 50% since 1970, and the rate of extinction is alarming. To restorethe balance, it is essential to work towards a future where both wildlife and humansprosper. We must take necessary measures to reverse the loss of nature and rebuild aharmonious relationship with the natural world, enabling both us and other species tothrive.
【題組】151.According to the passage, what has happened to the number of species on Earth since1970?
(A) It has increased by over 50%.
(B) It has remained stable.
(C) It has decreased by over 50%.
(D) It has remained the same.