Which of the following elements of the Constitution is the author defending in this quote?

 

“In republican government, the legislative authority necessarily predominates. The remedy for this inconveniency is to divide the legislature into different branches; and to render them, by different modes of election and different principles of action, as little connected with each other as the nature of their common functions and their common dependence on the society will admit.”–Federalist No. 51

Which of the following elements of the Constitution is the author defending in this quote?