Q: What causes the red color of laterite soils? A:

OPTIONS:
- oxygen
- toxins
- erosion
- iron oxides

Answer: iron oxides

Problem: OPTIONS:
- carbon
- helium
- acid
- water
Q: Q: In the presence of oxygen, hydrogen can interact to make what? A:
Answer: water

Problem:OPTIONS:
- skeletal
- nervous
- pulmonary
- circulatory

Q: Oxygenated blood is transported by what system? A:
****
A: circulatory

Q: During what time period did poor air quality become a problem? A:
OPTIONS:
- Chernobyl disaster
- coal industry boom
- second world war
- industrial revolution
industrial revolution

Q: When food is scarce, starving cells secrete a molecule that stimulates neighboring cells to do what? A:
OPTIONS:
- compete
- hoard energy
- die off
- aggregate

Answer: aggregate

input with options: Q: What is a representation of the valence electrons of an atom that uses dots around the symbol of the element? A:
OPTIONS:
- watson structure
- right structure
- time structure
- lewis structure
output:
lewis structure