Read the research paper excerpt and answer the question.

global warming, otherwise known as a gradual climate change, is a subject that has been in the spotlight more and more recently. the effects of global warming are on the rise, and they do not discriminate against any corner of the world; the effects are universal. the average temperature of our atmosphere continues to rise as the arctic ice continues to melt. coral reefs are dying in droves, and we are seeing an upsurge in extreme weather events, such as tropical storms and wildfires ("global"). it is time that we, as a nation, wake up and start taking care of the planet that has taken care of us for so long. as al gore so succinctly states, "what we take for granted might not be here for our children" ("memorable quotes").

how does the author's choice of underlined words affect the purpose of the paragraph?

the words are carefully chosen so as to trigger feelings of guilt within the reader.
the words are carefully chosen to scare those who read it into conserving resources.
the words are carefully chosen to make people feel depressed about what is happening to our earth.
the words are carefully chosen to persuade readers of the urgent need to join the fight against global warming.