Correct Answer: To openly display one's emotions.

Solution : The correct choice is the first option .

The idiom wear your heart on your sleeve means to openly show or display one's emotions, feelings, or affections without trying to hide them. It refers to someone who doesn't conceal their emotions and expresses them openly and visibly for others to see. That is quite similar to what is given in the first option.

Therefore, the appropriate meaning is: To openly display one's emotions.