Disposable plastic plates should not be used because:
A. They are made of materials with light weight
B. They are made of toxic materials
C. They are made of biodegradable materials
D. They are made of non-biodegradable materials

Hint: Here, we will proceed by defining the terms Biodegradable material, non-biodegradable material and disposable plastic plates. Then we will be discussing under which type of materials plastic comes and hence we will obtain the required answer.

Complete step-by-step answer:
Disposable plastic plates are made up of plastic and are designed for or capable of being thrown away after being used or used up.
Biodegradable material: A biodegradable material can be defined as a material which can be decomposed by b bacteria or other natural organisms and not be added to pollution.
Non-biodegradable material: A Non-Biodegradable material can be defined as a kind of substance which cannot be broken down by natural organisms and acts as a source of pollution.
Most plastics are non-biodegradable mainly because plastic is widely used because of its low cost, versatility and durability. This durability is partially based on plastic being an uncommon target for bacteria, which makes it non-biodegradable. So, disposable plastic plates should not be used because they are made of non-biodegradable materials.

Note: Littering of plastics in open spaces creates unhygienic conditions, as it acts as a breeding ground for insects and mosquitoes that cause diseases like malaria and dengue. Plastics do not undergo degradation, thus, stay in the soil for many years, which affects the soil fertility and degrades the soil quality.