What is the fourth paragraph of the passage, starting, “How much bigger ... .”, about?
Explanation:
The author mentions super-jumbo jets (option 4) at the end of the fourth paragraph. So, that is part of the paragraph and does not represent the whole of it. Option 3, “use of computer automation” is also very specific. It does not represent the complete idea. Stealth aircrafts (option 1) have been talked about in the third paragraph and not fourth. The paragraph introduces the idea of development of size in aircraft and ends the paragraph with the description of future double-decked superjumbo passenger jet. Therefore, the central theme of the paragraph is to describe the growing size of aircrafts.
Hence, the correct answer is option 2.
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