What did John Jacob Astor, Alexander Mackenzie, David Thompson, and John McLoughlin have in common?

Traders / Explorers

Explanation:

John Jacob Astor, Alexander Mackenzie, David Thompson, and John McLoughlin were all involved in early trading. Most of them were involved in the trading of furs as it was an important item due to the harsh cold climatic conditions.

They were also involved in exploration of other regions mostly by sea to amass wealth and control territories.

the compromise of 1850 was a package of five separate bills passed by the united states congress in september 1850, which defused a four-year political confrontation between slave and free states on the status of territories acquired during the mexican–american war

interdependence is when all participating groups and individuals depend on each other. if you depend on one anothers goods, you end up trading in order to get the items you're looking for. (for ex: if i have food and you have water, we trade in order to depend on each other to live)