Final answer:
People in India have gained access to electricity through a new wind farm, where grandmothers are trained as solar engineers to operate solar solutions in their villages (Option B).
Step-by-step explanation:
According to the provided information, what has helped people in India gain access to electricity is a program implemented by Barefoot College in Rajasthan, which focuses on providing solar electricity. The college works with villages where elders select grandmothers to be trained as solar engineers.
These engineers then help operate the solar-powered electricity solutions in their communities. The program has not only illuminated the lives of over 450,000 people across 1,015 villages but also contributed to environmental benefits such as a reduction in kerosene use and lower carbon dioxide emissions.
While the provided article does mention the advancements in wind energy, with India being the world's fifth largest wind-power producer and having significant installations such as those in Muppandal, Tamil Nadu, the direct cause of increased access to electricity as mentioned in the article is the solar electricity initiative by Barefoot College.
Thus, the correct option is B.
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