Which phrase from “president kennedy’s special message to the congress on urgent national needs” provides an urgent tone to the passage?
a. all of you have lived through the last four years and have seen the significance of space and the adventures in space
b. unless every scientist, every engineer, every serviceman, every technician
c. a means for even more exciting and ambitious exploration of space, perhaps beyond the moon, perhaps to the very end of the solar system itself
d. a new course of action, a course which will last for many years and carry very heavy costs: 531 million dollars in fiscal ’62

Read this passage from "the city without us" by alan weisman: which statement best explains how the structure of the passage supports the author's purpose? a. the passage traces several events in the order that they will occur to highlight how nature conquers human civilization. b. the passage shows that natural forces such as an absence of predators and an increase in the squirrel population can lead to destructive results. c. the passage shows that natural forms such as an absence of predators and human hunters can lead to the reforestation of new york city. d. the passage identifies how two natural forces are co-dependent - the deforestation of new york and the extinction of squirrels.