That won't get you anywhere. Taking more and more photos will. One exposure will put the elephants in silhouette and provide proper differentiation between the orb of the setting sun and the colorful sky. That's the right exposure and you bracket to get it. George shot slide film during the safari, which was another reason to bracket.
Slide film tends to be less forgiving of improper exposure than negative film.
You need to bracket when shooting this kind of a scene with slide film in order to make certain that your photo will be neither too dark nor too light. So whether you've on your way to Africa or Alaska, we're happy to have you drop by. By the way, George was recently in Africa taking more photos and we hope to be able to show you some of his recent work in a Student Profile just as soon as we catch up with him. No obligation of course. No salesman will call.