II. Put B on the blank if it is a biodegradable material and NB if nonbiodegradable. 9 toller paper 10 fish entrails 11 galvanized iron 15.concrete nail 16. fruit peelings 17. tin cans 12. dry leaves 13 rice hulls 14 face shield 18. plastic wrappers 19, barb wire 20. rice hay​