Problem: OPTIONS:
- Balance
- oxygen
- recovery
- Electrical
- heat
- sun's heat
- stay warm
- stamina
Q: Fact 1: Balance is the ability to sense and maintain body position. Fact 2: Body position is critical. Given the two facts above, what is critical?
Answer: Balance

Problem:OPTIONS:
- Broken light bulb.
- The sun.
- basic building blocks of life
- an electron microscope
- The source magazine.
- algae and plants
- the simplest of green plants
- An emergency lighting source.

Fact 1: Aflashlight requires a source of electricity to produce light. Fact 2: Flashlights provide the safest emergency lighting source. Given the two facts above, what requires a source of electricity to produce light?
****
A: An emergency lighting source.

Fact 1: Male dogs use pheromones in urine to mark their territory. Fact 2: Generally, pheromones are volatile substances. Given the two facts above, male dogs use what in their urine to mark their territory?
OPTIONS:
- hydrocarbons
- volatile substances
- kinetic energy
- an area swollen with pus
- Chemical energy
- competing for resources
- add a solute
- Positive charges
volatile substances

Fact 1: Ozone depletion results in higher levels of UV radiation reaching Earth. Fact 2: Ozone depletion in the stratosphere is a global problem . Given the two facts above, stratosphere composition causes higher levels of what reaching Earth?
OPTIONS:
- aliens
- dust
- scattered light
- photons
- emissions
- ozone
- UV radiation
- sunlight

Answer: UV radiation

Question: Fact 1: Irradiating food can be used to kill existing microorganisms in the food. Fact 2: Food irradiation offers a solution for addressing the growing concerns associated with food safety. Given the two facts above, killing microorganisms in food is important to?
OPTIONS:
- humans
- crop yeilds
- food safety
- health
- Cooking
- Animal survival
- recipe requirements
- farm production
Answer: food safety

input: OPTIONS:
- Glaciers
- our star
- hormones
- Weight
- Temperature
- Warmth
- an object
- trout Now, answer this question: Fact 1: Phase changes do not change mass. Fact 2: Weight is a product of gravity and mass. Given the two facts above, what doesn't a phase change alter?
A:
output:
Weight