4. douglass was approximately eight years old when he went to live with the auld
family. how does douglass contrast his childhood on colonel lloyd's plantation
with this arrival in baltimore at the auld's?

He believes  that his  stay in Colonel Lloyd's plantation would have made him remain a slave, but in Baltimore he believes he would not remain a slave and for him moving down there is a gift from God.

Explanation:

Douglass considers his move  to Baltimore as a blessing in disguise . If he had not been taken away  from Colonel Lloyd’s plantation at that time, Douglass he had the believe that, he would still be remain a slave, rather than a man writing his autobiography. while sitting freely in his house.  

Douglass perceived  that he may seem as self‑centered or  superstitious to suppose that providence had a hand in his delivery to Baltimore, but the feeling is still strong and true.

From is first memory, Douglass remembers sensing that he would not be a slave for long. this sense gives him belief in hard times, and he thinks of it as  a gift from God.