Rearrange the following sentences to form a coherent paragraph: 1. This process helps ensure that the food we consume is safe and free from harmful microbes or other impurities. 2. Food processing refers to a set of techniques used to convert raw ingredients into edible products. 3. These techniques may include simple steps like chopping and grinding, as well as advanced procedures such as pasteurization and fermentation. 4. In addition, it supports preservation by increasing shelf life and can also improve nutritional value.