The right answer for the question that is being asked and shown above is that: "He was afraid that Sir Tristram would steal La Belle Isoude away from King Mark on the journey." In King Arthur's Knights, King Anguish send La Belle Isoude and Sir Tristram off with a heavy heart because He was afraid that Sir Tristram would steal La Belle Isoude away from King Mark on the journey. hopw this helped u friend me btw