Analyze the concluding paragraph and answer the questions. In sh

Analyze the concluding paragraph and answer the questions.
In short, although the 20th century produced advantages by making some of us richer, healthier, and freer to enjoy our lives, it did not, in my opinion, make all of us wiser. The 20th century also made our world dirtier, our people less humane, and our spiritual lives poorer.
We wish to continue enjoying the benefits of technological advances because they free us to pursue other interests and goals. However, we must make a concerted effort to preserve our natural environment for future generations. Moreover, we should take the time now to make our lives more meaningful in the increasingly impersonal, mechanized world.
Examine the concluding paragraph and determine its relationship to the rest of the essay.
A、The concluding paragraph introduces unrelated topics.
B、The concluding paragraph provides a summary of the main points discussed in the essay.
C、The concluding paragraph contradicts the arguments presented in the essay.
D、The concluding paragraph is missing, leaving the essay incomplete.
【正确答案】：B