input: OPTIONS:
- it keeps an organism warm
- salt and water.
- granite
- magnesium
- gastropod shells
- ocean water
- calcium carbonate
- zinc Now, answer this question: Fact 1: Many corals secrete an exoskeleton that builds up to become a coral reef. Fact 2: Coral is calcium carbonate with a trade of carotene. Given the two facts above, a reef is made of?
A:
output: calcium carbonate

input: OPTIONS:
- a solute
- calcite
- weathering
- graptolites
- salinity
- rainfall
- movement
- thrust Now, answer this question: Fact 1: Sediment is formed by weathering. Fact 2: Sedimentary rocks are made from sediment. Given the two facts above, sedimentary rocks are formed by ?
A:
output: weathering

input: OPTIONS:
- making tables
- chopping down
- planting
- watershed
- earth
- bloom time
- growth
- timbering Now, answer this question: Fact 1: Planting trees has a positive impact on an ecosystem. Fact 2: An ecosystem contains many habitats. Given the two facts above, doing what with trees has a positive impact on habitats?
A:
output:
planting