Several sources close to the presidential transition said Mr. Biden had selected Gina McCarthy, who led the Environmental Protection Agency in the Obama administration, to lead the White House office of climate policy, and Jennifer Granholm, the former governor of Michigan, as the energy secretary. person to hold a cabinet-level position in the Biden administration, but the first in any cabinet, according to the Human Rights Campaign, an advocacy group that last month pressed Mr. Biden to appoint L.G.B.T.Q. community in the cabinet room will help President-elect Biden build back our nation better, stronger and more equal than before,” said Alphonso David, the president of the Human Rights Campaign. 