Spartan shoulders save retreating members of the greek army a. at the battle of marathon b. at the battle of thermopylae c. against a force of three hundreds persian troops d. against the strength of the athenian army

  B: at the Battle of Thermopylae.

name two ways organisms join a population and two ways organisms leave a population. two ways organisms join a population are birth rate and immigration. two ways they leave are death rate and emigration.

explanation:

adopted the practice of proskynesis, a persian court custom that involved bowing down and kissing the hand of others, depending on their rank.