Problem: OPTIONS:
- principals of aerodynamics
- Physical weathering
- floods
- the tilt of the planet
- an external framework
- dry conditions
- axis rotation
- relative location
Q: You are presented with the quiz "What causes earth's seasons?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "earth orbiting the Sun causes seasons to change" and "seasons are caused by the tilt of the axis relative to the planet's orbit". So, what's the best answer to the question?
Answer: the tilt of the planet
Problem:OPTIONS:
- enormous damage to homes
- Make money
- major threat to health
- harm them
- Plant growth is reduced
- Stay sick shorter
- Stay sick longer
- Get well faster

You are presented with the quiz "What does immunodeficiency do?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "immunodeficiency occurs when the immune system is not working properly" and "people with healthy immune systems usually get well on their own". So, what's the best answer to the question?
****
A: Stay sick longer
You are presented with the quiz "The infrared spectrum is not absorbed by what objects?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "if an object is black then that object absorbs all visible light" and "just next to the visible light spectrum is the infrared spectrum". So, what's the best answer to the question?
OPTIONS:
- eyes
- PDAs
- black
- skin
- Cars
- humans
- mines
- matter
black
You are presented with the quiz "What do astronauts need for extended flights?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "astronauts require preserved food for extended flights" and "custom foods and meals can be created". So, what's the best answer to the question?
OPTIONS:
- hydrogen and oxygen
- preserved meals
- solid, liquid, gas
- small meals
- fresh meals
- Dehydration
- nutrients
- surprise meals

Answer: preserved meals
Question: You are presented with the quiz "What causes contact between rocks?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "contact between rocks over long periods of time causes rocks to smooth" and "because of the big wave action, the rocks are very smooth". So, what's the best answer to the question?
OPTIONS:
- wind
- heat
- erosion
- deltas
- waves
- motion
- seasons
- rivers
Answer: waves
input: OPTIONS:
- bushes
- pollen
- sperm
- root
- leaf
- stem
- flower
- orchids Now, answer this question: You are presented with the quiz "a what has the purpose to produce for propagation" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "aflower 's purpose is to produce seeds" and "seed production is good, and propagation is by seeding". So, what's the best answer to the question?
A:
output:
flower