Problem: OPTIONS:
- green leaves
- nutrients
- a healthy stem
- hydration
- looseness of soil
- nearby mushrooms
- aqueous solution
- Organic compounds
Q: Fact 1: The looseness of soil increases the amount of oxygen in that soil. Fact 2: Oxygen in the soil is vital for healthy roots. Given the two facts above, what is vital for healthy roots?
Answer: looseness of soil

Problem:OPTIONS:
- the age of algae
- the age of flowers
- the age of mammals
- basic building blocks of life
- dead organisms
- movement of tectonic plates
- the age of petrified wood
- objects that have mass

Fact 1: Radioactive dating is used to determine the age of fossils. Fact 2: Fossil Petrified wood is the state fossil. Given the two facts above, what can be determined with radioactive dating?
****
A: the age of petrified wood

Fact 1: Some mollusks are nearly microscopic. Fact 2: Mollusks are the second-largest invertebrate group. Given the two facts above, some _ are nearly microscopic?
OPTIONS:
- gastropod shells
- invertebrates
- peachleaf willow
- homogenous
- barnacles
- an organism's body
- Veins and arteries.
- reproduce
invertebrates

Fact 1: Using a gasoline engine requires burning gasoline. Fact 2: Gasoline ignites easily and burns vigorously. Given the two facts above, using a gasoline engine requires what?
OPTIONS:
- electricity
- no ignition
- carbon dioxide
- easy ignition
- difficult ignition
- no gasoline
- hydrogen and oxygen
- adding heat

Answer: easy ignition

Question: Fact 1: Building housing developments usually requires replacing animal habitats. Fact 2: Developers plan housing tracts and build the houses on paper. Given the two facts above, developers planning housing tracts usually requires replacing what?
OPTIONS:
- food and shelter
- animal pens
- animal habitats
- animal fur
- important habitats
- animal food
- one celled organisms
- loose soil
Answer: animal habitats

input: OPTIONS:
- cell walls
- parasites
- dust
- layers of fat
- Veins and arteries.
- free nerve endings
- it keeps an organism warm
- ice Now, answer this question: Fact 1: Pressure receptors are found mainly in the skin. Fact 2: All pain receptors are free nerve endings. Given the two facts above, what are found in skin?
A:
output:
free nerve endings