Problem:OPTIONS:
- burning
- citric acid
- flow of electrons
- fashion
- acid wash
- chemical changes
- burning coal
- Pollution

Fact 1: The emission of sulfur dioxide causes acid rain. Fact 2: Sulfur in the coal becomes sulfur dioxide when burned. Given the two facts above, acid rain can be a result of:?
****
A: burning coal

Fact 1: Stalactites are formed by deposition. Fact 2: Small stalactites predominate on the cave roof. Given the two facts above, what is formed by deposition?
OPTIONS:
- h2o
- oceans
- Sediment
- soft soil
- calcite
- clouds
- cave roofs
- Sand dollars
cave roofs

Fact 1: Testosterone stimulates the reproductive organs to develop into male organs. Fact 2: Male mammals have a tube-like organ called the 'penis'. Given the two facts above, what causes the penis to develop?
OPTIONS:
- Creatine
- Energy
- Estrogen
- Testicles
- matter vibrating
- Testosterone
- movement
- It expands

Answer: Testosterone

Question: Fact 1: Corals form large colonies in shallow tropical water. Fact 2: Coral is the calcite shell of the coral animal. Given the two facts above, animals with _ form large colonies in shallow tropical water?
OPTIONS:
- calcite shells
- an organism's body
- Absorb light
- biological diversity
- Leptospirosis
- produce offspring
- allow growth
- to stay warm
Answer: calcite shells

input with options: Fact 1: Air pollution harms the respiratory and circulatory systems. Fact 2: Smoking is a form of air pollution. Given the two facts above, what harms the respiratory and circulatory systems?
OPTIONS:
- Cars
- oxygen
- smoking
- vehicles
- emissions
- gasoline
- fresh air
- lungs
output: smoking

Problem: OPTIONS:
- Aloe
- Cacti
- bamboo
- bushes
- Pines
- Ferns
- apple
- elms
Q: Fact 1: Trees have woody stems covered with bark. Fact 2: Pines in general are popular trees. Given the two facts above, what has a woody stem covered with bark?
Answer:
Pines