Donald Trump rewarded the tycoons behind the shale boom, among his most ardent supporters, with the selection Saturday of Chris Wright as his nominee for Energy Secretary. Wright was front-and-center for the fracking revolution that reshaped the country as a band of scrappy wildcatters that reinvigorated U.S. oil and gas production to record heights. His $2.8 billion company, Liberty Energy, pumps water and sand underground to frack customers’ wells. Wright’s selection elevates a pugnacious branch of the oil-and-gas industry that is skeptical of climate-change science and mostly hasn’t pledged to build out low-carbon energy businesses, unlike giants Exxon Mobil and...