Coal gas, coke and coal are:

Options

A. Responsible for ozone depletion
B. Fossil fuels
C. Causes of deforestation
D. Responsible for biogas formation

Answer

To answer the question "Coal gas, coke and coal are:", we need to analyze the options provided in the context of their characteristics and classifications. Here’s a step-by-step solution:

### Step 1: Identify Coal, Coke, and Coal Gas
- **Coal**: A natural fossil fuel formed from the remains of ancient plants and animals that have been subjected to heat and pressure over millions of years.
- **Coke**: A porous, carbon-rich material produced by heating coal in the absence of air, primarily used in steel production.
- **Coal Gas**: A gaseous product obtained from the carbonization of coal, used as a fuel.

### Step 2: Classify the Materials
- All three substances (coal, coke, and coal gas) are derived from coal and are primarily composed of carbon.
- They are all considered **fossil fuels**, which are natural substances formed from the remains of ancient organisms.

### Step 3: Understand the Role of Fossil Fuels
- Fossil fuels are significant sources of energy and are used for electricity generation, heating, and as industrial raw materials.
- They are also associated with environmental issues, including air pollution and greenhouse gas emissions.

### Step 4: Conclusion
- Therefore, the correct classification for coal gas, coke, and coal is that they are **fossil fuels**.

### Final Answer
Coal gas, coke, and coal are **fossil fuels**.

---