SEATTLE — Federal agencies are yet again considering plans to bring grizzly bears home to the deep forested valleys of the North Cascades where they once thrived. The National Park Service and U.S. Fish & Wildlife Service announced Thursday they would look at the options to bring back the big brown bears. “This is a first step toward bringing balance back to the ecosystem and restoring a piece of the Pacific Northwest’s natural and cultural heritage,” Superintendent Don Striker of North Cascades National Park said in a news release. “With the public’s help we will evaluate a list of options to…