Fill in the Blanks (Reading & Writing)

A sourdough starter is a living —colonycolonizecolonialcolonizing of wild yeast and bacteria that, once established, can be kept alive for decades with regular feeding. Bakers who neglect their starter may find it grows a layer of dark liquid, a sign that the culture has begun to —starvestarvingstarvedstarves through hunger. Reviving it usually just requires discarding most of the mixture and adding fresh flour to —replenishreplenishingreplenishedreplenishment the yeast.