Option c is correct because in older times there was less farming of steel/iron .

Ustensils - From Clay to Steel

Introduction:
Ustensils are tools or containers used for cooking or serving food. Earlier, they were made of natural materials like clay, mud, and rock. But now, they are made of steel and other metals. This shift in material has had a significant impact on the durability, safety, and efficiency of cooking.

From Clay to Steel:
Earlier, people used to make their ustensils from clay. Clay pots were used for cooking and storing food. They were cheap, lightweight and easy to make. However, they were not very durable and could easily break. Moreover, they could not be used for cooking on high flames as they could crack or break.

With the advent of technology, people started using metals like steel to make ustensils. Steel is a very strong and durable metal that can withstand high temperatures. It is also very easy to clean and does not absorb food odors or flavors. These qualities make steel ustensils much more efficient and hygienic than clay pots.

Advantages of Steel Ustensils:
1. Durability: Steel ustensils are much more durable than clay pots. They can withstand high temperatures and do not break easily.

2. Safety: Steel ustensils are safe for cooking as they do not react with acidic or alkaline foods. They also do not release any harmful chemicals into the food.

3. Efficiency: Steel ustensils heat up quickly and evenly, making them very efficient for cooking. They also cool down quickly, which is important for preventing overcooking.

Conclusion:
In conclusion, the shift from clay to steel ustensils has had a significant impact on cooking. Steel ustensils are more durable, safe and efficient than earlier clay ustensils. Therefore, they are preferred by most people today.