Problem: OPTIONS:
- Bend
- strength
- exercise
- ligt
- It expands
- shorten
- Vibrates
- stay warm
Q: You are presented with the quiz "What do muscle fibers need to do to enable movement?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "muscle contraction occurs when muscle fibers get shorter" and "movement is based on the contraction of muscles". So, what's the best answer to the question?
Answer: shorten
Problem:OPTIONS:
- reflection
- an electron lens
- chromatic dispersion
- greenhouse gases
- water condensation
- deoxyribonucleic acid
- Males and females
- movement of tectonic plates

You are presented with the quiz "what is formed by refraction of light by separating light into all different colors?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "arainbow is formed by refraction of light by separating light into all different colors" and "rainbow A most charming example of chromatic dispersion is a rainbow". So, what's the best answer to the question?
****
A: chromatic dispersion
You are presented with the quiz "what doesn't riding a bike cause?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "riding a bike does not cause pollution" and "carbon monoxide is, of course, an air pollutant". So, what's the best answer to the question?
OPTIONS:
- Allergies
- harmful substances
- Decrease bodily water
- Greenhouse gasses
- carbon monoxide
- global warming
- Dehydration
- chemical changes
carbon monoxide
You are presented with the quiz "What tool can enable evolution?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "sexual reproduction increases genetic diversity" and "evolution requires genetic diversity". So, what's the best answer to the question?
OPTIONS:
- By coral exoskeletons
- genetic bottle necks
- animals with backbones
- extinction
- A computer
- Deoxyribonucleicacid
- sexual reproduction
- theory of evolution

Answer: sexual reproduction
Question: You are presented with the quiz "What freezes into ice?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "freezing causes a solid to form" and "ice is a solid, it's cold and it's hard". So, what's the best answer to the question?
OPTIONS:
- liquid
- gas
- lipids
- coal
- water
- rivers
- hair
- lead
Answer: water
input: OPTIONS:
- wind
- rubber
- batteries
- watershed
- salinity
- Earthworms
- compost
- acid Now, answer this question: You are presented with the quiz "What balances the effect of air pollution in soil?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "air pollution can cause the pH of soil to decrease" and "compost balances the pH of soil". So, what's the best answer to the question?
A:
output:
compost