I'm pretty sure that the Grant's research showed finches on the Galapagos Islands
The question for your answer is “A”
The Sui evidently meant to replace the weak regimes of the age of disunion with strong centralized government, to unify China by eliminating the feeble “legitimate” Chinese regime at Nanjing. The emperor moved into his half-built capital in 583, and he immediately set his grand design in motion.
Answer:
B preventing pollution of the environment
Explanation
According to the excerpt, the purpose of the Act is to protect the environment by preventing pollution which will contribute to sustainable development.
Therefore, based on the excerpt, the main purpose of the law is to prevent pollution of the environment.