Problem:OPTIONS:
- lakes with large rocks
- a hydraulic system
- organisms and their habitat
- streams with two branches
- water with old boards
- scarce resources
- fissures of hot, acidic water
- streams with fallen trees

Fact 1: Hydropower requires damming a river. Fact 2: Streams and rivers are crossed on rocks, beaver dams, on fallen trees or by wading. Given the two facts above, hydropower requires beavers damming what?
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A: streams with fallen trees

Fact 1: Earthworm burrows help aerate soil, which is also good for plants. Fact 2: Earthworms Earthworms are in the phylum Annelids. Given the two facts above, what burrows help aerate soil, which is also good for plants?
OPTIONS:
- leaves
- adding heat
- Exfoliation
- good
- roots
- wind
- rocks
- annelids
annelids

Fact 1: Animals adapt to cold temperatures. Fact 2: Reindeer are well suited for the Arctic cold. Given the two facts above, what adapts to the temperatures of the Arctic?
OPTIONS:
- sweating
- people
- humans
- Chlorophyll
- engines
- Conifers
- reindeer
- Fuel cells

Answer: reindeer

Question: Fact 1: Adding salt to a solid decreases the freezing point of that solid. Fact 2: Freezing point depression is a colligative property. Given the two facts above, what effects the colligative properties of solids?
OPTIONS:
- salts
- seasons
- solutes
- size
- a prism
- forces
- fields
- Alcohol
Answer: salts

input with options: Fact 1: Animals require water for survival. Fact 2: Alice's favorite animal is the giraffe. Given the two facts above, what do giraffes require for survival?
OPTIONS:
- warmth
- water
- snacks
- milk
- prey
- energy
- food
- Energy.
output: water

Problem: OPTIONS:
- heat
- sugar
- energy
- Cars
- carbon
- bacteria
- tar
- Pollution
Q: Fact 1: Burning fossil fuels increases the carbon in the atmosphere. Fact 2: An inevitable byproduct of burning fossil fuels is carbon dioxide. Given the two facts above, what is a byproduct of fossil fuels?
Answer:
carbon