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. __________________________.
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. __________________________.
Solution
Left Link (Before → Option): The passage describes how Japanese dairy farms convert cow manure into hydrogen to power the local zoo.
Right Link (Option → After): The sentence should provide a concluding evaluation or summary of this innovative energy process described.
We need to fit the blank where it explains the significance of this cow manure to hydrogen conversion process to maintain coherence.
Option 3 accomplishes it best as "This is an exemplary way of creating a sustainable source of energy using innovative technology" - it provides a natural evaluative conclusion that summarizes the sustainability and innovation aspects of the process just described.
Eliminating other options:
Option 1: Abruptly shifts focus to India without smooth transition from the Japanese example.
Option 2: Too abstract and doesn't capture the innovation/sustainability significance of the described process.
Option 4: Makes unsupported broad generalization about Japan that goes beyond the specific example provided.