A fuel is a substance that can be burned or oxidized to release energy. It is the main component of the combustion process, where a chemical reaction takes place between the fuel and an oxidizing agent. When a fuel burns, it undergoes combustion and produces heat and light energy. The substance mentioned in the question that produces sufficient energy on burning is referred to as a fuel.

Here is a detailed explanation of the correct answer, option 'C':

Fuel:
A fuel is a substance that is capable of releasing energy through a chemical reaction, usually combustion. It is typically in a solid, liquid, or gaseous state and can be burned or oxidized to produce heat, light, and other forms of energy. Fuels are used in various applications, such as heating, cooking, transportation, and electricity generation.

Oxidizing Agent:
An oxidizing agent is a substance that accepts electrons from another substance during a chemical reaction. It facilitates the process of oxidation by providing oxygen or other electronegative elements. While an oxidizing agent is necessary for combustion to occur, it is not the substance that directly produces energy on burning.

Combustion Mass:
The term "combustion mass" is not commonly used in the context of energy production or combustion. It is not a suitable term to describe a substance that produces sufficient energy on burning.

Biogas:
Biogas is a type of fuel produced from the decomposition of organic matter, such as animal waste, agricultural residues, or sewage. It is a mixture of gases, primarily methane and carbon dioxide, along with traces of other gases. Biogas can be used as a fuel for heating, electricity generation, and cooking. While it is a fuel that produces energy on burning, it is not the specific substance mentioned in the question.

Therefore, the correct answer is option 'C' - fuel. A fuel is the substrata that produces sufficient energy on burning. It is essential for the combustion process and can exist in various forms, including solid, liquid, or gas.

Fuel is the correct answer
Fuel is a substrata that produces sufficient energy on burning. Here is a detailed explanation:
Definition of Fuel:
- Fuel is any material that can be burned or otherwise used to produce heat or power.
- It is a substance that undergoes combustion, releasing energy in the form of heat, light, or both.
Characteristics of Fuel:
- Fuel should have a high energy content or calorific value.
- It should be readily available and easy to store and transport.
- It should be easy to ignite and have a controlled burn rate.
- Fuel should have a low cost and be economically feasible.
Types of Fuel:
- Solid Fuels: Examples include coal, wood, and biomass.
- Liquid Fuels: Examples include gasoline, diesel, and kerosene.
- Gaseous Fuels: Examples include natural gas, propane, and biogas.
Energy Production:
- When fuel is burned, it undergoes a chemical reaction called combustion.
- Combustion releases energy in the form of heat and light.
- The energy released can be harnessed to perform various tasks, such as powering engines or generating electricity.
Importance of Fuel:
- Fuel is essential for various industries, transportation, and residential use.
- It provides the energy needed to power vehicles, heat homes, and operate machinery.
- The availability and efficiency of fuel sources have a significant impact on economic development and quality of life.
In conclusion, a substrata that produces sufficient energy on burning is called fuel. Fuel plays a crucial role in meeting our energy needs and powering various aspects of our daily lives.