What was the key reason for the ending of the native civilizations of America? (A)Slave labor worked them to death.
(B)Neighboring tribes revolted at their immense power.
(C)desire to control the precious mineral wealth
(D)refusal to convert to Catholicism

ME

Explanation:

Answer slave labor worked them to death

Explanation:

The Great Famine of Ireland that almost killed one million people in Ireland is discussed below in details.

Explanation:

The Great Famine of Ireland, Great Irish Famine that happened in the year 1845–49 in Ireland when the potato harvest failed in consecutive cycles. The crop declined because of a kind of plague that damages both the petals and the consumable part of the potato. That time authorities of Ireland could have stopped Irish wheat and barley from being shipped once it was obvious that the potato harvest had failed.