Which of these things is made of thermoplastic?

Options

A. Polythene bag
B. Electric plug
C. Utensil handle
D. Electric switch

Explanation

**Step-by-Step Solution:**

1. **Understanding Thermoplastics and Thermosetting Plastics:**
- Thermoplastics are materials that become soft when heated and can be molded into different shapes. They can be re-melted and re-shaped multiple times.
- Thermosetting plastics, on the other hand, harden permanently after being shaped and cannot be remolded upon heating.

2. **Identifying the Options:**
- The question asks which of the given options is made of thermoplastic. Let's assume the options are:
1. Polythene bag
2. Bakelite
3. Epoxy resin
4. Melamine

3. **Analyzing Each Option:**
- **Polythene bag:** This is made of thermoplastic. When heated, it becomes soft and can be reshaped. When cooled, it hardens again.
- **Bakelite:** This is a thermosetting plastic. Once it is set, it cannot be remolded.
- **Epoxy resin:** This is also a thermosetting plastic. It hardens permanently after curing.
- **Melamine:** This is another thermosetting plastic and cannot be reshaped once set.

4. **Conclusion:**
- Among the options provided, the polythene bag is the only item made of thermoplastic. Therefore, the answer is option number 1.

**Final Answer:**
The item made of thermoplastic is the **polythene bag** (option number 1).

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