The unicameral legislative branch created by the articles of confederation was most likely changed to a bicameral branch in the united states constitution because people

The answer is:  They wanted more of a separation of government power.

In unicameral legislative branch, there is only one chamber that held the full control regarding the type of legislation that can be passed by the government. Creating bicameral branch on the other hand, would create more than one oppositions that limit each other's influence within the government.

answer; regard the action of other people negatively;

answer; formal diagnosis (vera wand formal dress);