Final answer:
Option (b), The word 'colonize' in the Emancipation Proclamation means to 'establish'. This term is tied to Abraham Lincoln's consideration for the settlement of freed slaves outside the United States, which was part of broader strategies during and after the Civil War.
Step-by-step explanation:
The use of the word colonize in the context of the Emancipation Proclamation suggests the meaning 'to establish' (as a choice among the options provided: Build, Establish, Infiltrate, Populate). Lincoln's reference to colonization relates to his endorsement of organizing settlement for freed African Americans in Africa or another area, which was a subject of debate and consideration during his presidency.
In the broader context of the Emancipation Proclamation, Lincoln aimed to punish states in rebellion by freeing their enslaved population, while gradually pushing toward the end of slavery and considering the future post-emancipation society. The Emancipation Proclamation is a pivotal historical document as it declared free all slaves in Confederate states not under Union control and shifted the Civil War's objectives more strongly toward the abolition of slavery.