If we classify governments according to the relationship between the executive and legislative branches, what two forms of government exist?

There is the presidential government, in which the legislative branch and the executive branch are separated, and the parliamentary government, in which both branches are combined.

i think the answer is c, rivers.

explanation:

sometimes, borders fall along natural boundaries like rivers or mountain ranges. for example, the boundary between france and spain follows the crest of the pyrenees mountains. for part of its length, the boundary between the united states and mexico follows a river called the rio grande. the borders of four countries divide africa’s lake chad: niger, chad, cameroon, and nigeria.

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