Final answer:
The process of adding vitamin D to milk to prevent chronic diseases is known as fortification, which aims to improve food's nutritional value and address nutrient deficiencies. correct option is 1.
Step-by-step explanation:
When foods have nutrients added to them, like vitamin D added to milk, to reduce the risk of chronic disease, this process is referred to as fortification. This is different from enrichment, which involves replacing vitamins and minerals that were lost during food processing. Both practices aim to improve the nutritional quality of food and prevent nutrient deficiencies in the population.
Processed foods, in particular, can lose nutrients through heating and refining, leading to a need for these nutrients to be added back. Functional foods may also be fortified to enhance their health benefits, such as energy drinks being enriched with additional herbs or amino acids. Despite the benefits, the primary source of nutrients should always be a healthy diet, and supplements or fortified foods are not replacements for balanced nutritional intake.