Answer:
The United States became serious about the Space Race when the Russians (Soviet Union) released Sputnik into space
Explanation:
The Helots were state-owned serfs of the ancient Spartans.
The Nile river had a big impact on trade because it served as a source of transportation. Communities formed along the Nile were more developed.
Salt from the desert was a reliable and profitable resource traded.
Savannas were used to grow crops and the excess from the crops were traded.
