What is single-use plastic?

Correct answer: Plastic that is generally used once and then discarded

Single-use plastic means a plastic product intended or commonly used for one short period before being discarded. Examples include thin carry bags, disposable cups, straws, cutlery, and some food wrappers. The important identifying feature is not merely that the item is made of plastic, but that it is normally thrown away after one use rather than being designed for repeated use. Option B describes durable reusable plastic, whereas ordinary plastic does not automatically become compost or dissolve in water, as suggested by options C and D. Thus option A gives the correct definition.