Which of the following is a good combination of these two sentences into one, simplifying the idea? geese are birds with white feathers. geese are good swimmers.
a. geese are white feathered birds and geese are good at swimming.
b. geese are white-feathered birds that are good swimmers.
c. geese, which are good at swimming, are birds. they have white feathers.
d. geese, who are birds, have feathers, which are white, these birds are good swimmers.

the correct answer is c. he speculates on what might happen at given points in the future in a world without people. alan h. weisman is an american author, professor, and journalist. authors organize their information with a purpose. they present their ideas in an organized way. this is called text structure. weisman uses text structure so as to improve overall comprehension and to prove his points.

the sentence that best describes the tone of the passage from the radio broadcast compared to the passage from the book is b. the radio broadcast has a more surprised tone.

consider the text evidence: in the passage from the book, the description is more matter-of-fact. it is simply describing the things resembling little grey snakes, but there is no urgency in the description. on the other hand, in the passage from the radio broadcast, there is definetely urgency (you can tell from the expression used, "good heavens", which clearly indicates surprise.)