input: OPTIONS:
- heat production
- generating heat by burning
- harvesting crops
- damming rivers
- food and shelter
- heat is produced
- A transportation fuel
- planting seeds Now, answer this question: Fact 1: Coal is used for generating heat by burning. Fact 2: Coal and lignite are the lithified remains of plants. Given the two facts above, what are the lithified remains of plants used for?
A:
output: generating heat by burning

input: OPTIONS:
- gastropod shells
- aqueous solution
- archetype
- archive
- ocean water
- pollen
- archegonium
- sperm Now, answer this question: Fact 1: Fertilization occurs when sperm swim to an egg inside an archegonium. Fact 2: Pregnancy begins with a fertilized egg. Given the two facts above, sperm swim to an egg inside a what?
A:
output: archegonium

input: OPTIONS:
- Most plants
- an object
- barnacles
- Starfish
- Trees
- Cows
- a prism
- Coral Now, answer this question: Fact 1: Adult echinoderms have radial symmetry. Fact 2: Starfish and sea urchins are also echinoderms. Given the two facts above, what has radial symmetry?
A:
output:
Starfish