Answer:
A <em><u>batte</u></em><em><u>ry</u></em><em><u>.</u></em>
Explanation:
<em><u>#</u></em><em><u>c</u></em><em><u>a</u></em><em><u>r</u></em><em><u>r</u></em><em><u>y</u></em><em><u> </u></em><em><u>on</u></em><em><u> </u></em><em><u>learning</u></em>
<em><u>#</u></em><em><u>b</u></em><em><u>r</u></em><em><u>a</u></em><em><u>i</u></em><em><u>n</u></em><em><u>l</u></em><em><u>y</u></em><em><u> </u></em><em><u>fast</u></em>
Slave
His mother was a slave also
Number 3 would be the only logical choice in my opinion because everything else would be in a narrative or story of some sort. Expository essays are exclusively informational.