input: OPTIONS:
- Generating heat
- volume
- colors of the spectrum
- organisms and their habitat
- density
- Transfers energy
- gravity
- it helps plants in growing Now, answer this question: Fact 1: Energy enters ecosystems in the form of sunlight or chemical compounds. Fact 2: An ecosystem includes the organisms and their habitat. Given the two facts above, what does energy enter in the form of sunlight or chemical compounds?
A:
output: organisms and their habitat

input: OPTIONS:
- influenza
- chickenpox
- A rodent
- A primate
- A treeshrew
- fur and fat
- A flying lemur
- an object Now, answer this question: Fact 1: Threatening behavior by predators causes a porcupine to extend its quills. Fact 2: Porcupines are in the rodent family. Given the two facts above, what extends something because of threatening behavior by predators?
A:
output: A rodent

input: OPTIONS:
- Joules
- television
- a wave
- photons
- streams
- the Sun
- images
- fire Now, answer this question: Fact 1: Amirror is used for reflecting light. Fact 2: An image is formed in the mirrors each time the light bounces, forming multiple images. Given the two facts above, mirrors are used for reflecting what?
A:
output:
images