NEW YORK (AP) — Whole Foods shareholders and federal regulators approved Amazon's $13.7 billion acquisition of the organic grocer, a deal that could bring big changes to the supermarket industry and how people order groceries online.

By buying Whole Foods, Amazon is taking a bold step into brick-and-mortar, with more than 460 stores and potentially very lucrative data about how shoppers behave offline.

Two moves forward came Wednesday. Whole Foods shareholders gave their blessing to a union that its CEO had called "love at first sight." And the Federal Trade Commission said in a brief statemen...