Question: You are presented with the quiz "What are formed by flowing rivers through erosion over long periods of time." But you don't know the answer, so you turn to your teacher to ask for hints. He says that "most canyons are formed by flowing rivers through erosion over long periods of time" and "smithfield Canyon, a deep gorge through the mountains, dominates the view to the west". So, what's the best answer to the question?
OPTIONS:
- streams
- soft soil
- patch reefs
- flooding
- Sediment
- seas
- deep gorges
- wildfires
Answer: deep gorges
input with options: You are presented with the quiz "What is public transportation used to transport large amounts of?" 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 "public transportation is a great way to move massive amounts of people from place to place". So, what's the best answer to the question?
OPTIONS:
- animals
- energy
- people
- air
- boxes
- organisms
- athletes
- coal
output: people
Q: You are presented with the quiz "what do manatees do?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "migrants typically travel long distances" and "manatees are a migrant species". So, what's the best answer to the question?

OPTIONS:
- migrate
- reproduce
- play games
- stagnate
- survive
- Catch prey
- vocalizing
- burrow

A: migrate
input: OPTIONS:
- layers of fat
- bird species
- human species
- keystone species
- Organic compounds
- barnacles
- gastropod shells
- species of deer Now, answer this question: You are presented with the quiz "What are a source of food for many fish species?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "sponges are a source of food for many species of fish" and "sponges are also keystone species". So, what's the best answer to the question?
A:
output: keystone species
You are presented with the quiz "Most buried garbage has what impact on the environment?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "landfills have a negative impact on the environment" and "most garbage is buried in landfills". So, what's the best answer to the question?

OPTIONS:
- good
- neutral
- positive
- reduced heat
- erosion
- negative
- protect them
- uncontrolled

Answer: negative
Q: You are presented with the quiz "what does substances reacting with one another cause?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "chemical bonds form when substances react with one another" and "chemical bonds vibrate". So, what's the best answer to the question?

OPTIONS:
- density
- forces
- vibration
- death
- illness
- earthquakes
- Leptospirosis
- volume

A:
vibration