input: OPTIONS:
- sunlight
- cold fronts
- heating liquids
- earthquakes
- the moon
- solar eclipse
- a prism
- evaporation Now, answer this question: You are presented with the quiz "What can cause a rainbow?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "sunlight and rain can cause a rainbow" and "cold fronts bring in the rain". So, what's the best answer to the question?
A:
output: cold fronts
You are presented with the quiz "what build cells?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "cells are the microscopic building blocks of organisms" and "molecules are the building blocks of a cell". So, what's the best answer to the question?

OPTIONS:
- bushes
- roots
- insects
- layers of fat
- ferns
- fungi
- molecules
- Most plants

Answer: molecules
Problem: OPTIONS:
- mammals
- rocks
- animals
- sharks
- a fish
- cows
- humans
- plants
Q: You are presented with the quiz "What has skeleton made of tough tissue that contains a protein called collagen?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "cartilage is a tough tissue that contains a protein called collagen" and "sharks have a cartilage skeleton". So, what's the best answer to the question?
Answer: sharks
Problem:OPTIONS:
- roots
- Raft
- bamboo
- trees
- bushes
- Roads
- rivers
- streams

You are presented with the quiz "what blocks erosion?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "being exposed to wind can cause erosion of soil" and "wind erosion is slowed by wind barriers such as trees and shrubs". So, what's the best answer to the question?
****
A: trees
You are presented with the quiz "Flooding can cause what to leave an environment" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "natural disasters can cause animals to leave an environment" and "flooding is the most common natural disaster". So, what's the best answer to the question?
OPTIONS:
- fish
- animals
- ducks
- plants
- threatened
- kill them
- Sediment
- coastlines
animals
You are presented with the quiz "What is an example of a phase change?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "temperature changing can cause phase changes" and "global warming is the change of the Earth's temperature". So, what's the best answer to the question?
OPTIONS:
- flow of electrons
- Deoxyribonucleicacid
- chemical reaction
- dormant state
- Global warming
- It remains dormant
- bullfrogs
- swamp vegetation

Answer:
Global warming