prehistoric brontosaurus, taming process, dinosaur handler, leather harness, lush jungle, vibrant ferns, ancient trees, river stream, misty atmosphere, soft sunlight filtering through canopy, dynamic pose, side view, detailed scales texture, muscular legs, long neck reaching for leaves, tranquil expression, survival gear, primitive tools, 3/4 composition, ambient light, realistic style, action scene, immersive environment, wide-angle lens.