Explain why population settlements changed over time ?

Over time people move to other places depending on their opportunities.

Explanation: If someone wanted to be a farmer they would settle down in a more fertile area where they can get more land. and someone who wants to be a lawyer or doctor would settle in a more busy area in the city.

the roman republic began to expand when rome fought the punic wars and defeated carthage. the punic wars refer to the series of 3 wars fought among rome and carthage, before it ended in carthage's defeat.

answer they showed that organic molecules such as amino acids could be produced from inoragnic molecules;