input: OPTIONS:
- novel species
- exploratory species
- brave species
- pioneer species Now, answer this question: Q: What are species that are first to colonize a disturbed area called? A:
A:
output: pioneer species

input: OPTIONS:
- helper blood cells
- blue blood cells
- red blood cells
- white blood cells Now, answer this question: Q: Which blood cells serve to defend the body in various ways? A:
A:
output: white blood cells

input: OPTIONS:
- neck
- chest
- bottom
- head Now, answer this question: Q: The posterior end of a typical rib is called what? A:
A:
output:
head