*Question*
If houses have disappeared because of precipitation, then houses have disappeared because of what? Answer choices: - Physical weathering - moonlight - sunshine - flooding - clouds - precipitation - scarce resources - erosion
**Answer**
precipitation

*Question*
If steroids are chemical messengers that control many body functions, then what are chemical messengers that control many body functions? Answer choices: - deltas - bioaerosols - acetic acid - sweating - veins - human - oxygen - steroids
**Answer**
steroids

*Question*
If creating wood-free paper does not require lumberjacks, then creating wood-free paper does not require what? Answer choices: - scarce resources - patience - deforestation - testing - science - lumberjacks - Energy. - carbon dioxide
**Answer**
lumberjacks

*Question*
If food is preserved by drying, then how is food preserved? Answer choices: - liquid - moistness - hydration - bacteria - mold - heat - Cooking - drying
**Answer**
drying