Explanation:
Except in the crust, the interior of the Earth cannot be studied by drilling holes to take samples. Instead, scientists map the interior by watching how seismic waves from earthquakes are bent, reflected, sped up, or delayed by the various layers.
Answer: Battle of Marathon. Battle of Thermopylae. Battle of Salamis. Battle of Artemisium. Battle of Plataea.
Explanation: I hope this is correct. Because I am pretty sure it is not just 3.
