input: OPTIONS:
- waves
- seasons
- cracks
- weather
- night
- storms
- Injury
- motion Now, answer this question: You are presented with the quiz "rotation cause what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "aplanet rotating causes cycles of day and night on that planet" and "time is movement, the motion of the planet in its rotation and its movement around the sun". So, what's the best answer to the question?
A:
output: night
You are presented with the quiz "What is used for keeping food fresh for a long period of time?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "arefrigerator is used for keeping food fresh for a long period of time" and "kitchen appliances include refrigerator". So, what's the best answer to the question?

OPTIONS:
- Gardens
- an electric stove
- A kitchen appliance
- Fuel cells
- Plates
- Air freshener
- Electric generators
- electricity

Answer: A kitchen appliance
Problem: OPTIONS:
- warmth
- heat energy
- a slowing of global warming
- gold
- electricity
- adding heat
- mutant protection
- carbon dioxide
Q: You are presented with the quiz "Burning garbage can be used to produce what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "biofuel is used to produce electricity by burning" and "among the energy sources referred to as biofuels is garbage". So, what's the best answer to the question?
Answer: electricity
Problem:OPTIONS:
- hydrogen
- root growth
- weathering
- animals
- artificial intelligence
- mutation
- trees
- competition

You are presented with the quiz "what is the basis for natural selection?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "mutation creates new genetic variation in a gene pool" and "genetic variation is the basis for natural selection". So, what's the best answer to the question?
****
A: mutation
You are presented with the quiz "What supplies food consumed by people?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "grasses supply most of the food consumed by people worldwide" and "grasses are wheat and wild oats". So, what's the best answer to the question?
OPTIONS:
- air
- animals
- bacteria
- wheat
- dust
- camels
- bamboo
- trees
wheat
You are presented with the quiz "what are found in place to indicate a place used to be covered by water?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "if fossils of a water animal or plant are found in a place then that place used to be covered by water in the past" and "graptolites , in deep-water deposits, are the dominant fossils". So, what's the best answer to the question?
OPTIONS:
- mussels
- Sea urchins
- Conifers
- patch reefs
- graptolites
- loose dirt
- cartilage
- Sediment

Answer:
graptolites