Problem:OPTIONS:
- orientation
- species
- small
- muscle
- ferns
- host
- grow
- size

Fact 1: Cells vary in size as well as shape, but all cells are very small. Fact 2: Cells just vary in their forms and functions. Given the two facts above, cells what as well as shape is related to their forms and functions?
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A: size

Problem:OPTIONS:
- Light energy
- money
- wealth
- sunlight
- The Sun
- food and shelter
- energy
- Mechanical energy

Fact 1: Most plants continue to grow throughout their lives. Fact 2: Plants use the light energy to grow. Given the two facts above, what do most plants continue to use throughout their lives?
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A: Light energy

Problem:OPTIONS:
- Electrical energy
- electricity
- electron microscope
- density
- light bulbs
- rays or beams
- sounds
- hydrogen and oxygen

Fact 1: Alaser is used for producing light. Fact 2: Light seems to travel in rays or beams. Given the two facts above, what is a laser used for producing?
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A: rays or beams

Problem:OPTIONS:
- underground burrows
- looseness of dirt or compost
- one celled organisms
- above ground pools
- grassy fields
- an external framework
- near the shoreline
- tall trees

Fact 1: If an animal lives under ground then that animal will be protected from a wild fire. Fact 2: Marmots live in underground burrows. Given the two facts above, marmots in what will be protected from wild fires?
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A:
underground burrows