A、Lack of water. B、The pollution. C、Dams and other water projects. D、The enforcement of laws regarding wildlife. C短文开头提到，This la

Millions of acres of land where all kinds of wildlife made their homes have been ruined in recent years. This land has been ruined by federally approved water projects such as dams built in violation of a rarely enforced law passed in 1934. According to this law, all projects to modify a body of water can be carried out only after a thorough study to discover what damage may be caused to the wildlife in the area. Many states have not complied with the law. In three southern states, Alabama, Louisiana and Mississippi, about 1.2 million acres of wildlife habitat have been covered with water because of dams which have been constructed there. Another plan to build a dam in Tennessee was fought because it would flood large areas of wildlife habitat, particularly endangering a species of small fish called the snail darter. The proposed dam would also destroy several important archeological sites, including the ancestral capital of the ancient Cherokee Indian Nation. To prevent any further destruction, the public must become accurately informed about the advantages and disadvantages of our national water projects. Only then can we be assured that existing laws will be enforced.
Questions 33 to 35 are based on the passage you have just heard.
33. According to the speaker, what is responsible for many animals’ losing their homes?
34. What is required by the rarely enforced 1934 law?
35. According to the speaker, how can further destruction be prevented?