The correct option is
A Grass, flowers and leaves
Biodegradable materials are the substances made of organic matter, such as plant and animal matter, that can be easily broken down by detritus organisms
For example, vegetable peels and other kitchen waste, vegetables, fruits, tea leaves, paper, wood, etc.
Whereas non-biodegradable materials are those materials, which cannot be broken down easily, and retain their form for a long period of time. For example, metals, tin, glass, plastics etc.
So, the correct answer is 'Grass, flowers and leaves'