Question:
Use evidence from the fact that the digestive system digests food for the body to answer the following question. OPTIONS:
- water
- metal
- sustenance
- rocks "The digestive system digests what for the body?"

Answer:
sustenance

Question:
Use evidence from the fact that an animal requires enough nutrients to maintain good health to answer the following question. OPTIONS:
- find healthy food
- experience failing health
- fail to gestate
- prepare to mate "If a deer is unable to eat regularly, or only eats that which lacks essential minerals, the deer may"

Answer:
experience failing health

Question:
Use evidence from the fact that live birth means developing inside the mother instead of an egg to answer the following question. OPTIONS:
- skin
- scales
- exoskeletons
- gills "Many animals that give birth to live young have"

Answer:
skin