Concept:

• Food items are cooked in a variety of ways.
• Some are baked and some are fried.
• Some are roasted while some are steamed. 

Explanation:

Baking:

• Baking is the process of cooking food in an oven or an enclosed baking utensil.
• Example: Baking birthday cake in the oven.

Frying:

• Frying is the process of cooking food in hot oil.
• Example: Frying potato chips.

Roasting:

• Roasting is a cooking method that uses dry heat where hot air covers the food.
• Example: Roasting vegetables on the grill.

Boiling:

• Boiling is the method of cooking food in boiling water.
• Example: Boiling potatoes in water.

Kneading:

• Kneading is a process in the making of dough by mixing water and flour.
• Example: Kneading dough for roti. 
• It is not a cooking method.

Rolling:

• Rolling is the process of flattening dough using a rolling pin.
• Example: Rolling dough in a round shape for roti.
• It is not a cooking method.

Soaking:

• Soaking means putting an item into water or liquid for a long period of time.
• Example: Soaking chana in water.
• It is not a cooking method.

​Thus, baking, frying, roasting are methods of cooking food.