Answer:
An isthmus is a narrow strip of land that connects two larger landmasses and separates two bodies of water.
Explanation:
Answer: The discovery of gold nuggets in Sacramento Valley which came to be known as The California Gold Rush.
When civil war took place between Eritrea and Ethiopia many people traveled to Sudan and put up camps.
Explanation:
Many refugees settled in Sudan as the civil war between Ethiopia and Eritrea for a prolonged period of time. These camps in Sudan had very harsh environment as well as there was scarcity of clean water and medicines.
Not only the civil war was the main reason why people migrated to Sudan as refugees but there were several other reasons they were violence took place between the population based on political as well as ethical lines, subsequent famine and lastly due to drought.
I personally think the answer is a