Problem: OPTIONS:
- a crust
- a gorge
- a peak
- a basin
Q: Q: What is a three dimensional snycline? A:
Answer: a basin

Problem:OPTIONS:
- vascular disease
- bulging veins
- cataracts veins
- varicose veins

Q: Wich disorder arises when defective valves allow blood to accumulate within the veins? A:
****
A: varicose veins

Q: What magnetism is produced by electricity? A:
OPTIONS:
- excitation
- diffusion
- Charges
- electromagnetism
electromagnetism

Q: What are archaea that live in extremely hot environments called? A:
OPTIONS:
- hypothermic
- hemophiliacs
- tardigrades
- thermophiles

Answer: thermophiles

Question: Q: What is the term for the gases that surround a planet? A:
OPTIONS:
- hemisphere
- galaxy
- biosphere
- the atmosphere
Answer: the atmosphere

input: OPTIONS:
- reproduction
- function
- instance
- behavior Now, answer this question: Q: Researchers have also used insect courtship to explore genetic variation underlying differences in what? A:
A:
output:
behavior