Indian cuisine varies from region to region, reflecting the people of the ethnically diverse subcontinent. Generally, Indian cuisine can be split into four categories: North, South, East, and West Indian. Despite this diversity, some unifying threads emerge. Varied uses of spices are an integral part of food preparation, and are used to enhance the flavor of a dish and create unique flavors and aromas. Ayurveda(Ayur-Life veda-studies) has laid the foundation to the basic style of cooking in India as early as the Indus valley civilization.