Once a day a cheap, gaudy packet arrived upward from st. louis, and another downward from keokuk. before these events, the day was glorious with expectancy; after them, the day was a dead and empty thing. which comedic technique does this excerpt best illustrate? a. sarcasm b. hyperbole c. understatement d. irony

Oceans produce approximately 80 percent of the oxygen our planet needs to support animal life. pollution that reaches the ocean through dumping, oil leaks, runoff, and other processes interferes with that oxygen production and poses a real threat to the oxygen content in our atmosphere. if the oxygen content decreases, it is likely that carbon dioxide will increase. this could have dramatic consequences for life as we know it. which does this passage indicate causes a decrease of oxygen in the atmosphere?