question: Write a question you would see in a school textbook. OPTIONS:
- The rock layers contain pollutants that dissolve soil.
- The rock layers lack water due to extended droughts.
- The rock layers are compressed forming faults and folds.
- The rock layers are moved closer to rivers which erode landforms.
answer: Generally, the deeper rock layers of Earth are older than shallower rock layers. How can the collision of two tectonic plates change the order of the rock layers?

question: Write a question you would see in a school textbook. OPTIONS:
- capturing energy from sunlight
- consuming living plant material
- taking energy from animal hosts
- breaking down dead plant material
answer: Which of the following best describes a role of mushrooms in ecosystems?

question: Write a question you would see in a school textbook. OPTIONS:
- to keep the eggs inside the nest
- to keep the eggs warm
- to protect the eggs from the wind
- to protect the eggs from the rain
answer:
Most birds sit on their eggs until they hatch. Which of these is the most important reason why birds sit on their eggs?