Answer:
The legislative branch checks the executive by controlling the budget that it can spend, by approving or rejecting many of the nominations that the executive makes, and by having the prerogative of impeaching the president.
It checks the judicial branch by being the body that approves or rejects most important judicial appointments, including the appointments to the Supreme Court. It also has a check on the judiciary simply because it is the legislative the branch that creates the law that judges interpret.
Finally, the legislative branch checks on itself by being a bicameral body that has to conciliate most laws and measures between the two bodies: the House and the Senate.
Answer:
The legislative branch makes laws, but the President in the executive branch can veto those laws with a Presidential Veto. The legislative branch makes laws, but the judicial branch can declare those laws unconstitutional.
