1. Which of the following is best describe for decaying materials. a. they undergo decaying process b. they are made of metals c. they do not decompose by bacteria d. they can be recycled 2. Which of the following materials do not undergo decay? a. glass c. banana leaves b. wood d. paper plate 3. Animals plants and human waste are classified as a. biodegradable c. non-organic materials b. non-biodegradable d. disposable materials 4. Non-biodegradable materials do not undergo decay. Why? a. they have ability to hold water b. they are decayed by bacteria c. they do not hold moisture d. they are materials from animals, plants and human waste. 5. Materials that do not decay are called a. biodegradable c. explosive materials b. non-biodegradable d. corrosive materials 6. Which of the following is non-biodegradable materials? a. candy wrappers c. dried leaves b. banana stick d. watermelon seeds​