Fact 1: The emission of sulfur dioxide causes acid rain. Fact 2: Polluted rain is called acid rain . Given the two facts above, answer the question "What causes pollution in rain?" with the following options: - sulfur dioxide - carbon dioxide - nitrogen - contamination - smog - hydrogen - fossil fuels - flooding
sulfur dioxide

Fact 1: Erosion of soil has a negative impact on the environment. Fact 2: Soil Erosion Soil erosion is a natural process. Given the two facts above, answer the question "What kind of process can have a negative impact on an environment?" with the following options: - coal - natural - Pesticides - flooding - cigarettes - Smoking - Cars - burning
natural

Q: Fact 1: Keeping food cold is used for keeping food fresh. Fact 2: Keep your food fresh, simple and as natural as possible. Given the two facts above, answer the question "What is used to keep foods as simple and as natural as possible?" with the following options: - Energy - sodium - lipids - heat - RNA - cold - fibers - sugar
A: cold

Question: Fact 1: Biofuel is used to produce electricity by burning. Fact 2: Biofuels include ethanol, methanol, biodiesel, biocrude, and methane. Given the two facts above, answer the question "what does methane produce when burned?" with the following options: - carbon dioxide - energy - electricity - The atmosphere - heat energy - adding heat - It expands - kinetic energy
Answer: electricity

*Question*
Fact 1: Digestion is the process of breaking down food into components the body can absorb. Fact 2: Saliva starts to break down the food. Given the two facts above, answer the question "what does digestion involve?" with the following options: - ovaries - saliva - Energy. - chemicals - heat - cooking - cooking food - matter
**Answer**
saliva

Q: Fact 1: Aprism is used for refracting light. Fact 2: Refraction Refraction is the bending of light rays. Given the two facts above, answer the question "What may bend light rays?" with the following options: - fibers - prism - an ion - sun - a wave - lightbulb - forces - flashlight
A: prism