Problem:OPTIONS:
- lagoon
- graptolites
- a cuticle
- barnacles
- bioaerosols
- cave
- coral reef
- salt and water.

Fact 1: Many corals secrete an exoskeleton that builds up to become a coral reef. Fact 2: Coral reefs are made up of the accumulated exoskeletons of the coral polyp. Given the two facts above, what do coral polyps form?
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A: coral reef

Problem:OPTIONS:
- feet
- smell
- fibers
- light
- radiation
- nose
- squids
- vision

Fact 1: Eyes are used for seeing by animals by sensing light. Fact 2: Vision is out the eyes. Given the two facts above, what is used for seeing?
****
A: vision

Problem:OPTIONS:
- a fish
- animals
- brain cells
- organs
- critical organs
- protons
- neutrons
- bones

Fact 1: Brain cells die quickly if their oxygen supply is cut off. Fact 2: If the oxygen supply to the brain is cut off, a stroke can occur. Given the two facts above, what die quickly if a stroke occurs?
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A: brain cells

Problem:OPTIONS:
- Daisy
- Wind
- Amoeba
- pollen
- Ant
- orchids
- Flowers
- Honeybee

Fact 1: Petals attract pollinators to the flower. Fact 2: Daisy leaves and white petals are used in salads. Given the two facts above, what attracts pollinators?
****
A:
Daisy