What is the purpose of the separation of powers in a presidential form of government? to ensure that no branch has more power over another
to ensure that political authority rests with the people
the ensure that the executive branch is under the direct control of the legislative branch
to ensure that local and national governments are co-equal partners

to ensure that no branch has more power over another

Explanation:

Because of check and balances.

A) to ensure that no branch has more power over another.

Explanation:

Checks and balances is another term more or less for separation of power. It means that one branch of government can't do something without relying on the support from another branch.

Example: The supreme court (the judicial branch) members are elected by the executive branch (the president)