Which of the following properties of plastic makes it most convenient for use?

All of the above

The correct answer is option 4. All of the above.

The property of plastic that makes it most convenient for use is: It is light, strong, and durable. The lightweight nature of plastic makes it easy to handle and transport. The strength and durability of plastic allow it to be used in a wide range of applications, from packaging to construction materials. While plastics can be molded into various shapes, not all plastics are easily remoldable, and this property is not as universal as their strength and durability. Some plastics can be remolded through specific processes, but it's not a general characteristic of all plastic materials. Plastic being non-reactive is also a desirable property, especially in applications where chemical stability is important. So, among the options, the lightweight, strong, and durable nature of plastic makes it widely convenient for various purposes.