What aspect of personal cleanliness is most critical in preventing a hazardous condition by contaminating food products?

The correct answer is hand washing. Hand washing is the single most important way in preventing the contamination of food products (for food industry worker) and the most effective way of preventing the transfer of infectious organisms in the workplace. Hand washing is proven to be effective in personal cleanliness. 

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.