input with options: Fact 1: Some viruses have an envelope of phospholipids and proteins. Fact 2: Phospholipids are body fats, too. Given the two facts above, besides proteins, what do some viruses have an envelope of?
OPTIONS:
- bioaerosols
- parasites
- more abundant
- gravity
- heat energy
- Energy
- red blood cells
- body fats
output: body fats

input with options: Fact 1: Lions live in social groups called prides. Fact 2: Richard the Lion Heart's shield has three lions on it. Given the two facts above, what social group is on Richard's shield?
OPTIONS:
- humans
- insects
- people
- A pride.
- fur seals
- animals
- bears
- mammals
output: A pride.

input with options: Fact 1: Harming an animal species has a negative impact on the population size of that species. Fact 2: Animals are harmed because of cosmetic testing. Given the two facts above, what has a negative impact on the population size of a species?
OPTIONS:
- Pesticides
- influenza
- steroids
- liver cancer
- cloudy and rainy weather
- massive damage
- cosmetic testing
- killing insects
output: cosmetic testing

input with options: Fact 1: Behaviors that improve fitness increase through natural selection. Fact 2: Natural selection is the mechanism of evolution. Given the two facts above, what do behaviors that improve fitness increase through?
OPTIONS:
- density
- evolution
- Plants growth
- gravity
- animals
- competition
- death
- environment
output:
evolution