The correct answer to this open question is the following.
Although there are no options attached we can say the following.
The principle of the checks and balances branches help prevent any one branch of government from becoming too powerful while this is of vital importance.
One negative effect on this system could be that one of the branches could defend a decision that is affected by a political bias or party interest trying to affect the proper political, legislative, or judicial decision at hand.
However, the importance of the checks and balances system is that none of the three branches has more power than the other, trying to exert more power that could end up being detrimental.
Let's have in mind that the executive branch is the President of the US and his cabinet. The Legislative branch is the US Congress divided into two branches: the House of Representatives or lower branch, and the Senate or upper chamber. And the Judicial branch that is the Supreme Court.