input: OPTIONS:
- glass
- dead vegetation
- Fuel cells
- preserved vegetation
- Electrical energy
- hydrogen and oxygen
- clouds
- electricity Now, answer this question: Fact 1: Coal is used for generating heat by burning. Fact 2: Dead vegetation settles and becomes peat, a precursor of coal. Given the two facts above, what becomes something that is burned to generate heat?
A:
output: dead vegetation

Fact 1: Rocks interacting with wind over long periods of time causes weathering. Fact 2: On Earth, rocks are weathered by wind and water, creating soil and sand. Given the two facts above, rocks interacting with what over time causes creation of soil and sand?

OPTIONS:
- sound
- light
- wind
- river
- breath
- stream
- motion
- force

Answer: wind

Problem: OPTIONS:
- glucose
- oxygen
- Joules
- liquid
- organs
- molecules
- atoms
- blood
Q: Fact 1: Veins generally carry deoxygenated blood. Fact 2: Arteries and veins are blood vessels. Given the two facts above, vessels carry deoxygenated what?
Answer: blood

Problem:OPTIONS:
- lunar eclipse
- solar eclipse
- electricty
- heat
- wind
- fire
- Winter
- rivers

Fact 1: Wind causes erosion. Fact 2: Wind erosion severely damages soils and crops. Given the two facts above, which phenomena can severely damage soils and crops?
****
A: wind

Fact 1: Cold fronts cause thunderstorms as they pass by. Fact 2: Thunderstorms Thunderstorms give birth to tornadoes. Given the two facts above, what causes tornadoes? ?
OPTIONS:
- Electrical energy
- scattered light
- hypothyroidism
- Time and energy
- harmful substances
- Cold fronts.
- Tropical
- heat energy
Cold fronts.

Fact 1: Plants exhibit phototropism, or growing toward a light source. Fact 2: Bamboos are vigorous, rugged plants. Given the two facts above, what exhibits phototropism?
OPTIONS:
- Oak
- potatoes
- flowers
- Trees
- bamboo
- sunlight
- deep-sea organisms
- the Sun

Answer:
bamboo