Which of the following is not a check that the legislative branch has over the executive branch?
a. can impeach the president
b. approves presidential nominations
c. declare presidential acts unconstitutional
d. controls the budget

The Legislative Branch cannot "declare presidential acts unconstitutional," since this is one of the ways in which the judicial branch checks power, through the act of "judicial review". 

i think you are talking about the image i am uploading. then let's see who is who and based on that, let's answer your question about what section represents the state-level courts.

who is who:

box a: state trial courts box b: intermediate appellate courts   box c: state supreme courts box d: u.s. supreme court box e: u.s. courts of appeals box f: u.s district courts

which section represent state-level courts?

the correct answer is a, b, c.

box a or state trial courts are the bottom level and they decided about the 95% of the nation's legal cases.box b or intermediate appellate courts (also called state court of appeals in some states) are the second level above trial courts. they have the authority to review decisions and judgments of the trial court judges.box c or state supreme courts are the highest level in the u.s. state court system.   their primary responsibility consists of correcting the errors of the inferior state courts. they exclusively hears appeals on legal issues from inferior state courts. since state supreme courts do not make any finding of facts, they do not hold trials.