5. In what ways had the Incas adapted their civilization to the environment by the sixteenth century?

a. The Incas built up large floating islands of soil to grow crops in their many lakes.

b. The Incas hunted and gathered using horses they bought from Europeans.

C. The Incas built roads and bridges to facilitate networks of exchange in mountainous areas.

d. The Incas imported potatoes and wheat from far distant trading partners to supplement

their diet.

while it was true that the cotton gin reduced the labor of removing seeds, it did not reduce the need for slaves to grow and pick the cotton.

explanation:

before eli whitney's invention of the cotton gin, picking and cleaning cotton was a slow, labor-intensive job. workers, usually slaves, had to pick the seeds from the cotton fibers by hand. this invention made it possible to grow large amounts of cotton on big farms and make money.

which specific shipwreck are you talking about?

the speech convinced americans that the ussr was an enemy, rather than an ally, which led to the creation of the truman doctrine.

they sent much needed naval support to the colonists, and were instrumental in the siege of yorktown