Please help it’s multiple choice

What was the purpose for "checks and balances" in the government? it made possible a system of accountability. it would control the national bank. it would the states to work together to solve national problems.

Write a descriptive essay as a participant observer describing the culture and the lifestyle of the lakota tribe based on information from the online link. be sure to read all journal excerpts before writing the essay. when possible, include a description of family, education, religion, economic, and political systems you observed in the excerpts.

Describe two observations that galileo was the first to make with his telescope.