Southerners argued that slave labor was superior because

•slaves worked in many industrial areas.
•slaves actually enjoyed being property
•slaves and slaveholders depended on one another
•manumission brought shame to freed slaves.

slaves and slaveholders depended on one another

Explanation:

Southern slaveholders often used biblical passages to justify slavery. ... the South where reliance on slave labor was the foundation of their economy. ... Defenders of slavery argued that if all the slaves were freed, there would be ... on the one side and the friends of order and regulated freedom on the other. ... Manumission

zheng he was a chinese explorer who lead seven great voyages on behalf of the chinese emperor. his seven total voyages were diplomatic, military, and trading ventures, and lasted from 1405 – 1433. however, most historians agree their main purpose was to promote the glory of ming dynasty china.

explanation: