Problem: OPTIONS:
- sunlight
- energy barrier
- coastlines
- erosion
- ocean
- earthquakes
- tornado
- mechanical
Q: Fact 1: Faulting of rock in Earth 's crust causes earthquakes. Fact 2: Earthquakes are caused by movements on faults. Given the two facts above, what does fault movement form?
Answer: earthquakes

Problem:OPTIONS:
- density
- evolution
- Plants growth
- gravity
- animals
- competition
- death
- environment

Fact 1: Behaviors that improve fitness increase through natural selection. Fact 2: Natural selection is the mechanism of evolution. Given the two facts above, what do behaviors that improve fitness increase through?
****
A: evolution

Fact 1: Creating paper requires cutting down trees. Fact 2: To cut down a tree is like destroying a life. Given the two facts above, creating paper may cause?
OPTIONS:
- Physical weathering
- Something to move
- destroying life
- It expands
- Greenhouse gases
- contamination
- Pollution
- harmful substances
destroying life

Fact 1: Awarm front causes cloudy and rainy weather. Fact 2: Winds are calm and skies are clear or partly cloudy when the eye of a storm passes. Given the two facts above, what does a warm front cause?
OPTIONS:
- friction
- symptoms
- rainfall
- fire
- tsunamis
- heat
- earthquakes
- storms

Answer: storms

Question: Fact 1: Some touch receptors sense differences in temperature or pain. Fact 2: Touch receptors are a type of mechanoreceptor. Given the two facts above, what senses differences in temperature or pain?
OPTIONS:
- h2o
- the body's largest organ
- dead nerve cells
- Electric devices
- heat
- the skin
- sensory neurons
- mechanoreceptors
Answer: mechanoreceptors

input: OPTIONS:
- blood
- water
- lipids
- health
- oxygen
- food
- cells
- Sun Now, answer this question: Fact 1: Living things all require energy for survival. Fact 2: Food is the source of energy for living things. Given the two facts above, what do living things require?
A:
output:
food