Problem:OPTIONS:
- plant reproduction
- to produce leaves
- to make new plants
- Reproduction
- to produce petals
- protect them
- to produce roots
- spread flower seeds

Fact 1: Aflower 's purpose is to produce seeds. Fact 2: Seeds grow into new plants. Given the two facts above, what is a flower's job?
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A: to make new plants

Problem:OPTIONS:
- Wasps
- camels
- sheep
- insects
- animals
- sharks
- birds
- ducks

Fact 1: Migration is a type of movement that changes population size. Fact 2: Bird Migration and Isotopes Tracking animal migration is a difficult task. Given the two facts above, what undergoes a movement that changes population size?
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A: birds

Problem:OPTIONS:
- Heat energy
- ice to form from water
- Physical weathering
- clear roads
- Plant growth is reduced
- picnic weather
- exposure to cold
- tropical storms

Fact 1: Freezing causes a solid to form. Fact 2: Ice is the solid form of water. Given the two facts above, freezing causes what?
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A: ice to form from water

Problem:OPTIONS:
- vehicles
- humans
- breathing
- gasoline
- dirt
- disease
- rocks
- cells

Fact 1: Amold spore has a negative impact on the respiratory system. Fact 2: Respiratory symptoms include difficulty breathing, wheezing, and stridor. Given the two facts above, a mold spore has a negative impact on what?
****
A:
breathing