7. Increases in atmospheric carbon dioxide contribute to climate change by… a. cooling the atmosphere
b. trapping the heat produced by the suns rays
c. increasing the energy output of the suns rays
d. making flowers bloom and warming peoples hearts

B because when there is more carbon dioxide in the atmosphere and it traps the heat inside that why it doesn't snow a lot anymore.

Hope this helps :)

The correct answer for this question is "to emphasize the dedication and generosity of young activists." The reasoon why the author most likely include these details about the young activists activities in order to emphasize the dedication and generosity of young activists