Which heading best completes the partial outline below? 1.
2. Sectionalism
3. Tension between the North and the South
4.Lincoln's election

the enslaved people onboard suffered from illness with some frequency

idk

explanation:

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)

the spanish  

hope this meaning spain btw