Fact 1: Bacteria in soil convert atmospheric nitrogen into a form usable by plants. Fact 2: Many orchids are rewarding indoor plants. Given the two facts above, bacteria in soil converts atmospheric nitrogen into a form usable by what?

OPTIONS:
- bacteria
- humans
- density
- Conifers
- Roundworms
- gravity
- h2o
- orchids

Answer: orchids

Problem: OPTIONS:
- that material's properties
- our landscape
- balance of the environment
- death and devastation
- important habitats
- swamp vegetation
- the environment
- Animal survival
Q: Fact 1: Population density is the average number of individuals per unit of area or volume. Fact 2: Population densities affect the balance of the environment. Given the two facts above, what do the average number of individuals per unit of area or volume affect?
Answer: balance of the environment

Problem:OPTIONS:
- water
- sweating
- glass
- layers of fat
- wind
- insulator
- a cuticle
- conductor

Fact 1: Athermal insulator slows the transfer of heat. Fact 2: Insulation helps to block conduction of heat. Given the two facts above, what prevents conduction?
****
A: insulator

Fact 1: When a hemisphere is tilted towards the sun , that hemisphere receives more direct sunlight. Fact 2: During the summer in Britain the sunlight strikes the Northern part of the Earth more directly. Given the two facts above, when is a hemisphere tilted towards the sun?
OPTIONS:
- mild
- Vernal equinox
- autumn
- Spring
- Summer
- positive
- Autumnal Equinox
- Tropical
Summer

Fact 1: Thick fur can be used for keeping warm. Fact 2: Pelts are the skins of animals with the fur attached. Given the two facts above, what can be used by an animal to keep warm?
OPTIONS:
- a thick pelt
- heat energy
- evaporation
- energy
- kinetic energy
- electricity
- four limbs
- organic molecules

Answer: a thick pelt

input with options: Fact 1: Amphibians have permeable skin that easily absorbs substances from the environment. Fact 2: Some substances are harmful to the body and block biological systems. Given the two facts above, what can amphibians permeable skin do?
OPTIONS:
- Display wealth
- Make money
- resistance
- Help them fly
- Vibrates
- Harm them
- It expands
- Damages them
output:
Harm them