Problem:OPTIONS:
- bushes
- on calories
- habitat
- manmade structures
- invasive species
- disease
- bamboo
- trees

Fact 1: Cutting down trees has a negative impact on an ecosystem. Fact 2: Ecosystems are living communities. Given the two facts above, cutting down what has a negative impact on living communities?
****
A: trees

Problem:OPTIONS:
- lung
- UV
- foot
- damage
- skin
- death
- breast
- harm

Fact 1: Lung cancer is most often caused by exposure to tobacco smoke. Fact 2: Tobacco includes cigarettes, cigars, chewing tobacco, and more. Given the two facts above, what kind of cancer does exposure to cigarettes and cigars often cause?
****
A: lung

Problem:OPTIONS:
- power an electrical device
- disconnect
- move to different locations
- heat is produced
- matter vibrating
- photosynthesis
- fuel cell
- preventing heat transfer

Fact 1: Powering an electrical device with a battery requires a path for electricity to flow through a closed circuit. Fact 2: An electric circuit is a closed path for electron flow. Given the two facts above, electron flow allows a battery to do what?
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A: power an electrical device

Problem:OPTIONS:
- sugar
- Energy.
- antennae
- Energy
- wings
- nothing
- food
- pancreas

Fact 1: Wings are part of the exoskeleton and attached to the thorax. Fact 2: Insects have exoskeletons. Given the two facts above, what is attached to insects' thorax?
****
A:
wings