Problem:OPTIONS:
- Cooking
- Masks
- Glasses
- skin
- Gloves
- Hats
- Urea
- oxygen

You are presented with the quiz "What keeps smoke out of the respiratory system?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "abreathing mask is used for keeping harmful particles from entering the respiratory system" and "all smoke is harmful to the respiratory system". So, what's the best answer to the question?
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A: Masks

Problem:OPTIONS:
- proteins
- Plants growth
- genetic fluid
- mitosis cells
- chromosomes
- pollen
- Leptospirosis
- Chemical energy

You are presented with the quiz "What is the form of genetic material used during mitosis called?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "chromosomes are the form of the genetic material of a cell during cell division" and "mitosis is cell division". So, what's the best answer to the question?
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A: chromosomes

Problem:OPTIONS:
- Lift
- Air
- cars
- Populations
- wind
- Raft
- Move
- marine

You are presented with the quiz "What is used to move people?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "transportation technology is used for moving people" and "transportation Transportation is by truck and raft". So, what's the best answer to the question?
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A: Raft

Problem:OPTIONS:
- heat production
- heat loss
- sweating
- permineralization
- hypothermia
- resistance
- cramping
- heat energy

You are presented with the quiz "What ccurs when many muscles contract a little bit all at once?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "shivering occurs when many muscles contract a little bit all at once" and "heat production is increased by shivering and non-shivering thermogenesis ". So, what's the best answer to the question?
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A:
heat production