Before Whole Foods and Earth Fare brought their eco-minded organic vibe to grocery shopping, Tropical Nut & Fruit and Healthy Home Market were putting a Charlotte touch on wholesome food. Today, a second generation runs the business — really two companies — focused on manufacturing and distributing snack foods and a four-store chain of natural food stores. “People are looking for healthy choices, and we have definitely been riding that wave for the last 10 years,” says John Bauer, president…