Problem:OPTIONS:
- bacteria
- sodium
- lipids
- cold
- gas
- sugar
- cooled
- dust

Fact 1: Arefrigerator is used for keeping food fresh for a long period of time. Fact 2: Refrigerator is too cold. Given the two facts above, what keeps food fresh?
****
A: cold

Problem:OPTIONS:
- Energy.
- thiamine
- vitamins
- allow growth
- Energy
- hormones
- Bodily water
- brain

Fact 1: Endocrine hormones travel throughout the body in the blood. Fact 2: Endocrine glands secrete directly into the blood. Given the two facts above, what do glands secrete?
****
A: hormones

Problem:OPTIONS:
- Pesticides
- bacteria
- Allergies
- fungi
- animals
- dangerous
- ferns
- disease

Fact 1: Viruses cannot reproduce by themselves. Fact 2: Viruses Viruses are the smallest agents of disease. Given the two facts above, the smallest agents of what cannot reproduce by themselves?
****
A: disease

Problem:OPTIONS:
- heat energy
- highlights
- photons
- stardust
- rainfall
- Solar energy
- moonlight
- sunlight

Fact 1: Refracting sunlight causes sunlight to split into different colors. Fact 2: White sunlight is split into a rainbow of colors. Given the two facts above, what refracting causes a rainbow of different colors?
****
A:
sunlight