"I Have Questions" is built around melancholic lyrics. The singer does not understand why her lover has left her and has questions for them. Its dark production features a prominent cello line and drum machine beats that begin after the second chorus. On its release, the song charted in Spain, Portugal and France. Cabello performed the song at the 2017 "Billboard" Music Awards, the 2017 iHeartRadio Much Music Video Awards and "Britain's Got Talent".