What is a tessera? explain how this puts people in increased danger? this about hunger games btw

can you say more details

brutus overlooks that the majority of the crowd served julius caesar the military general. he appeals to their citizenship as romans by calling them first by that name in his salutation: "romans, countrymen, lovers." mark antony, however, speaks in terms understood by the military, by calling them first by, "friends, romans, countrymen." he recalls not only caesar the general but caesar the friend, whose body they see covered with stab wounds.

i would say the correct answer is not concrete.

i think the answer will be theseeeennutttsssss