input with options: Q: What moves sediments after they have formed? A:
OPTIONS:
- photosynthesis
- migration
- perspiration
- erosion
output: erosion

Q: Q: What is the name for the pores in leaves that allow a plant to retain water or exchange gases? A:

OPTIONS:
- neurons
- chloroplasts
- rhizomes
- stomata

A: stomata

input: OPTIONS:
- mutation
- genetic drift
- variety
- adaptation Now, answer this question: Q: The toothlessness of modern birds, which serves to trim the weight of the head, is an example of what? A:
A:
output: adaptation

Q: What type of ions play critical roles in light-dependent reactions? A:

OPTIONS:
- calcium
- silicon
- helium
- hydrogen

Answer: hydrogen

Problem: OPTIONS:
- nitrogen
- precipitation
- oxygen
- pollutants
Q: Q: Air quality is a measure of what in the air? A:
Answer: pollutants

Q: Name the law that determines as to which rock layers are younger or older than others. A:

OPTIONS:
- law of gravity
- geologic theory
- law of apposition
- law of superposition

Answer:
law of superposition