According to the passage, the outbreak of dengue hemorrhagic fever in the 1950's occurred for which of the following reasons?

The passage suggests that a lack of modern sanitation would make which of the following most likely to occur?

It can be inferred from the passage that the author describes coral reef communities as paradoxical most likely for which of the following reasons?

According to the passage, which of the following is a factor that is threatening the survival of coral reef communities?

The author refers to "filter-feeding animals" (see highlighted text) in order to

The passage suggests which of the following about coral reef communities?

The passage is primarily concerned with

It can be inferred from the passage that the author believes which of the following about the complaint mentioned in the last paragraph?

The passage suggests that which of the following is most likely to be true of United States trade laws?

The passage warns of which of the following dangers?