From all these excerpts of "Lifeboat Ethics: The Case Against Helping the Poor", the last sentence is the one that provides an example of logos because it gives clear and compelling information that helps address the topic by employing reason.
It provides hard data through statistics, to argue his case and convince the reader to believe his ideas.
Answer:
On the average poor countries undergo a 2.5 percent increase in population each year; rich countries, about 0.8 percent.
