Fact 1: Earthworm burrows help aerate soil, which is also good for plants. Fact 2: Good drainage is essential for growing plants in containers. Given the two facts above, earthworm burrows help aerate soil, which is essential for what?
OPTIONS:
- making plants
- agriculture
- potting plants
- Exfoliation
- watering plants
- growing plants
- important habitats
- food and shelter

Answer: growing plants

Fact 1: Awindmill converts wind energy into electricity primarily by using mechanical energy. Fact 2: An electric field is created by voltage. Given the two facts above, what does a windmill create?
OPTIONS:
- Light
- wind
- loose soil
- energy
- voltage
- Decibels
- dust
- rain

Answer: voltage

Fact 1: Muscle contraction occurs when muscle fibers get shorter. Fact 2: Exercise causes muscles to contract. Given the two facts above, what causes muscle fibers to get shorter?
OPTIONS:
- friction
- acetic acid
- heat or cold
- sweating
- electrically
- resistance
- Damages them
- exercise

Answer:
exercise