Legislator, executive, and judicial
I believe the answer would be the last one
In which time period because if it was during colonization it was because Europeans brought diseases and they weren't immune to it (there was no resistance)
A traveler would need a currency exchange because in different countries the money is usually different then the place the traveler comes from. For example if the traveler is going to Mexico and the traveler brings $100, the money that will be given back when he does a currency exchange is $1,867.94. Exchange rates are determined in the foreign exchange market or a bank. Hope this helps! :) Pls mark me brainliest!! :)