The correct answer is; an experiment.
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Rock python and golden monitor lizard
The answer that fits the blank is OBSERVATION. The best kind of research that suits about the colors of which babies are attracted to in toys would be through observation research. Babies' actions cannot be controlled and for subjects like this, the only experiment or research that is appropriate is observation.
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The ephors were a council of five elected annually who swore "on behalf of the city" while the kings swore for themselves. ... Up to two ephors would accompany a king on extended military campaigns as a sign of control, and they held the authority to declare war during some periods in Spartan history.
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