Some of the most famous explorers ser to sail for Spain were Juan Ponce de León, Ferdinand Magellan, Hernán Cortés and FRANCISCO VÁSQUEZ DE CORONADO
The North and the South grew apart, because they had very different opinions on slavery and if they should have it or not. They had different perspectives on almost EVERYTHING!
Hope this helped :)
The Hull House was a settlement house that helped immigrants assimilate to American culture after immigrating from Europe. They helped immigrants become official citizens and gave activities to children and helped them learn American culture.
"Sumerian city-states fought each other" would be the best option from the list, since this internal division led to a collapse of power that left people without protection or a solid economy.

<u>Sputnik </u>was the first man-made satellite to orbit Earth, launched by <u>Soviet Union</u> on October 4, 1957, inaugurated the space age. Sputnik 1, the first <u>artificial satellite</u> launched, was a 83.6-kg (184-pound) capsule.