Busy by nature

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Across
  1. 2. a person or animal that can give birth
  2. 3. to make babies
  3. 4. to create something
  4. 7. to take care of
  5. 8. a group of animals working together
  6. 9. fight to protect
Down
  1. 1. the physical world, including plants and animals
  2. 2. to give food
  3. 5. a person or animal that can't give birth
  4. 6. a job that is completed regularly
  5. 7. to push out an egg