input with options: Q: What helps represent age-sex structure of the population? A:
OPTIONS:
- habitat chart
- density graph
- biome model
- population pyramid
output: population pyramid

input with options: Q: What builds up in an artery and reduces blood flow? A:
OPTIONS:
- pressure
- calcium deposits
- surface tension
- plaque
output: plaque

input with options: Q: Potential energy is present in objects that are what? A:
OPTIONS:
- crystals
- rigid
- unstable
- elastic
output: elastic

input with options: Q: What 3 types of friction occur between solid surfaces? A:
OPTIONS:
- static , arching , rolling
- static,desending,sliding
- static , ascending , rolling
- static, sliding, rolling
output:
static, sliding, rolling