Answer:
Forced exodus is usually a long term displacement of people, while volcanic eruption is often a short term displacement of people.
Step-by-step explanation:
geAn example of a long term displacement of people is the forced exodus, like in the example of the Macedonians in the northern part of what is now Greece. The Greeks, supported by UK aircrafts, because of geopolitical interest (for the UK) and fascist and expansionist policies (by Greece) started to systematically attack the native Macedonian population in the Aegean Macedonia region. Hundreds of thousands of people were forcefully ''traded'' with other countries, children were left without parents and sent to countries further away that was willing to take them, and many were killed brutally by the military and by throwing napalm bombs on the houses. The properties were confiscated and given to Greeks that came from Turkey, while the Macedonians were never allowed to go back nor to get any compensation, even though they have won the case in an international court for human rights.
An example of short term displacement of people is a volcanic eruption. The areas around the volcanoes tend to be heavily populated, and the main reason for this is usually the highly fertile soil. When a volcano has a very big and life-threatening eruption, the people move away from the area in order to save themselves. This is usually not permanent though, as the majority tend to come back because of the highly fertile soil which gives them conditions to produce huge amounts of agricultural goods. Such an example is the island of Sicily, where people have been moving in and out of the area around Etna on numerous occasions throughout history.