Plastic fragments with sizes from $1\,\mu\text{m}$ to $1\,\text{mm}$ are known as microplastics. Microplastics are added to some face creams and are also generated when clothing is made. They are now being detected in rising amounts in oceans around the world. Apart from their tiny size, what other feature of microplastics makes them harmful to living organisms?
- AThey are lightweight.
- BThey are non-biodegradable.
- CThey are non-reactive.
- DThey are toxic.