Question

An island in Japan boasts of numerous dairy farms that own nearly one million cows, and supplies 70% of the milk sold in the country. These dairy farms have now begun to use cow manure to produce hydrogen. The methane from cow manure mingles with steam in a high temperature environment to produce hydrogen, which is used to electrify the local zoo. _____________________.

• A. This shows how Japan has always used technology to help animals
• B. The Indian government too, should replicate this, and use such technology to produce hydrogen
• C. It is a case study of a certain animal that is useful in providing energy for several other animals
• D. This is an exemplary way of creating a sustainable source of energy using innovative technology

Hint:

A good concluding sentence for a descriptive paragraph often summarizes the main point or highlights its broader significance. Look for the option that captures the "so what?" of the information presented.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
The question asks for a concluding sentence that best summarizes the significance of the process described in the paragraph.
Step 2: Detailed Explanation:
The paragraph describes a process where a waste product (cow manure) is converted into a useful energy source (hydrogen) to power a local facility (the zoo). This is a clear example of innovation aimed at sustainability.

Option (1) makes a broad, unsupported claim about what Japan has "always" done.
Option (2) introduces a recommendation for another country (India), which is outside the scope of the descriptive paragraph.
Option (3) is too narrow and slightly inaccurate. The energy is for the zoo, not "several other animals."
Option (4) provides an excellent summary. It correctly identifies the process as "exemplary" (a good example), "sustainable" (using waste to create energy), and involving "innovative technology." This captures the essence of the entire paragraph.
Step 3: Final Answer:
The best concluding sentence is: "This is an exemplary way of creating a sustainable source of energy using innovative technology".