Disposable plastic plates should not be used because
(a) they are made of materials with lightweight
(b) they are made of toxic materials
(c) they are made of biodegradable materials
(d) they are made of non-biodegradable materials
Disposable plastic plates should not be used because they are made of non-biodegradable material, i.e., plastic. They can cause pollution, block drains and harm animals.
Non-biodegradable materials do not decompose naturally or even artificially by any means. The only thing we can do with non-biodegradable materials is to reduce, reuse and recycle them. So disposable plastic plates should not be used.
Therefore option (D) is correct