input with options: Fact 1: Increasing heat causes thermal expansion. Fact 2: An increase in temperature is the result of the flow of heat into the system. Given the two facts above, he flow of heat into the system causes what?
OPTIONS:
- thermal shields
- thermal detonation
- thermal expansion
- Plant growth is reduced
- chemical reaction
- Evaporation
- kinetic energy
- thermal heat
output: thermal expansion

input with options: Fact 1: All animals are heterotrophs. Fact 2: Most animals live by ingesting food and digesting it within specialized cavities. Given the two facts above, how do heterotrophs live?
OPTIONS:
- math
- allow growth
- laziness
- Chlorophyll
- shock
- the environment
- an organism's body
- Digesting food
output: Digesting food

input with options: Fact 1: Echinoderms lack a centralized nervous system. Fact 2: Sand dollars and sea biscuits are also echinoderms. Given the two facts above, what lacks a centralized nervous system?
OPTIONS:
- Damaged hearing
- Humans
- Horses
- Sand dollars
- insects
- Chickens
- Pesticides
- barnacles
output: Sand dollars

input with options: Fact 1: The number of rings in a tree trunk can be used to estimate the age of the tree. Fact 2: Tree rings are examined to learn the forest age and growth rate. Given the two facts above, you can determine the growth rate of the forest by examining what?
OPTIONS:
- seasons
- tissue
- bark color
- cycles
- alleles
- radiation level
- rings
- color gradient
output:
rings