Final answer:
Ty should expect the south pole of the bar magnet to attract the north pole of the horseshoe magnet, as opposite poles attract in magnetism.
Step-by-step explanation:
When investigating what happens when Ty puts a bar magnet next to a horseshoe magnet, he should expect the south pole of the bar magnet to attract the north pole of the horseshoe magnet, and vice versa. This is because, in magnetism, opposite poles attract each other. The north pole of a magnet is always attracted to the south pole of another magnet and repelled by its north pole; similarly, the south pole of a magnet is attracted to the north pole of another and repelled by its south pole. Therefore, the correct answer to his question is D) South pole of the bar magnet and north pole of the horseshoe magnet.