Cooking is the art of cookery
Thank you for that information can you tell me a little more about cookery ?
Cooking techniques and ingredients varies
How do they vary ? Can you give me an example
Cooking is done on fire or stove or oven
Oh okay thank you for that information 
They ways or types of cooking also depend on the skill and type of training an individual cook has
Yeah i bet there are various methods of cooking .  That would make sense
ingredients. New inventions and technologies, such as the invention of pottery for holding and boiling water, expanded cooking techniques. Some modern cooks apply advanced scientific techniques to food preparation to further enhance the flavor of the dish served.
History.
Phylogenetic analysis suggests that human ancestors may have invented cooking as far back as 1.8 million to 2.3 million years ago. Re-analysis of burnt bone fragments and plant ashes from the Wonderwerk Cave, South Africa, has provided evidence supporting control of fire by early humans there by 1
Cooking
Cooking or cookery is the art, technology, science and craft of preparing food for consumption. Cooking techniques and ingredients vary widely across the world, from grilling food over an open fire to using electric stoves, to baking in various types of ovens, reflecting unique environmental, economic, and cultural traditions and trends. The ways or types of cooking also depend on the skill and type of training an individual cook has. Cooking is done both by people in their own dwellings and by professional cooks and chefs in restaurants