Which of the following is an accurate example of exercising legislative power?
(a.)the president signing a bill into law
(b.)the election of representatives to congress
(c.)the senate voting on a bill
(d.) the supreme courts deciding a law is unconstitutional

The correct answer is
(C.)the senate voting on a bill

The first option is exercising executive power, while D is exercising judicial power, or judicial review as it is called. The election is not a part of the three branches, but when people are chosen for the congress then they do get legislative power.