Why was spain the first one to import slaves to the new world?​

To meet demand of labor

Explanation:

In the America, Spain was the first one to make widespread use of enslaved People as a colonialist labor force. To accommodate the increasing demand for work in agriculture and manufacturing and mining, the Spanish tried to acquire a new labor source, slaves from African Continent. Many 16th Europeans were familiar with the practice of slavery.

an earnest tone.

because portia wants to know why brutus has been acting strange lately.