Topic sentences draw readers’ attention to the main purpose of a piece of writing. it sends the same message as a thesis or claim. write a topic sentence that is clear and direct.

The Constitution divides powers between the federal government's branches. The Constitution creates a structure that limits the powers of our government.

Correct The Constitution divides powers between the federal government's branches. The Constitution creates a structure that limits the powers of our government.

Explanation:

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.

the social contract theory