Define the following word lists into their simplest form

Sure! Here are the definitions of the word lists in their simplest form:

1. **Intentional Food Additives**: Substances added to food on purpose to enhance flavor, color, texture, or shelf life (e.g., preservatives, flavor enhancers, and coloring agents).

2. **Unintentional Food Additives**: Substances that accidentally become part of food during production, processing, or packaging (e.g., contaminants, residues from pesticides, or trace amounts of other ingredients).

3. **Food Preserving**: Methods used to prevent food spoilage and extend its shelf life (e.g., refrigeration, freezing, drying, canning, and using preservatives).