You are presented with the quiz "Creating wood-free paper can avoid what process?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "creating wood-free paper does not require cutting down trees" and "deforestation happens when people cut down forests or when trees are burned". So, what's the best answer to the question?
OPTIONS:
- Using pulp
- Dehydration
- Deforestation
- erosion
- Physical weathering
- Using calender rolls
- Using chemicals
- contamination

Answer: Deforestation

You are presented with the quiz "the smallest agents of what cannot reproduce by themselves?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "viruses cannot reproduce by themselves" and "viruses Viruses are the smallest agents of disease". So, what's the best answer to the question?
OPTIONS:
- Pesticides
- bacteria
- Allergies
- fungi
- animals
- dangerous
- ferns
- disease

Answer: disease

You are presented with the quiz "What can cause cancer by producing mutations in DNA?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "most carcinogens cause cancer by producing mutations in DNA" and "smoke is full of carcinogens". So, what's the best answer to the question?
OPTIONS:
- maples
- PDAs
- A drug.
- copper
- coal
- CO 2
- smoke
- sponges

Answer:
smoke