Which of the following represents the greatest use of petroleum products? A. Generating electricity
B. Heating homes and businesses
C. Manufacturing
D. Solar power
E. Transportation

B.

Explanation:

Biofuels, such as ethanol and biodiesel, are also used as petroleum products, mainly in mixtures with gasoline and diesel fuel. Petroleum is the largest U.S. energy source. We use petroleum products to propel vehicles, to heat buildings, and to produce electricity.

Henry David Thoreau was an American essayist, poet, and philosopher. A leading transcendentalist, Thoreau is best known for his book Walden, a reflection upon simple living in natural surroundings, and his essay "Civil Disobedience", an argument for disobedience to an unjust state. hope this helps :)