<span>A is the correct answer. Early civilisations were likely to fight over control of resources, as being able to access water and food is vital for survival, and those who did not have to trade for access to these resources would have been able to accumulate more wealth. </span>
An immigrant is someone who decides to live in a foreign land. The lives of the immigrants are somehow more difficult than the original settlers of the land because there might be biases in the law when it comes to who gets to work in a certain company, government, etc. The worst part of their experience could be being not so accepted in the foreign land due to some existing laws, etc.
"International trade leads to specialization because industries begin to compete to offer the best prices and increased demand. In modern globalization economy, many countries are linked by international trade."
