PARIS—Inflation in the eurozone will decrease gradually over the year as its main drivers, such as surging energy prices and supply bottlenecks, are expected to ease, European Central Bank (ECB) head Christine Lagarde told France Inter radio. “This will stabilise and ease gradually in the course of 2022,” she said. Asked on her policy to counter price pressures, Lagarde reiterated that the ECB did not need to act as boldly as the U.S. Federal Reserve because of a different economic situation. “The cycle of the economic recovery in the U.S. is ahead of that in Europe. We thus have every reason not to act as rapidly and as brutally that one can imagine the Fed would do,” she said, adding that inflation, too, was higher in the U.S. “But we have started to react and we obviously are standing ready, to react by monetary policy measures if the figures, the …