You might do something you never wanted to do in the first place, without thinking about it. For example, if you were startled by someone sneaking up on you, and you punched them in the face impulsively, and that person was, say, your mother, then you might want to undo your actions.
Answer:
Horse
Explanation:
The rest of the potential answers are inanimate objects with wheels, while a horse is a live animal. All are modes of transportation, but a horse is the outlier.
Answer:
Gold is usually alloyed in jewellery to give it more strength, and the term carat describes the amount of gold present (24 carats is pure gold). It is estimated that all the gold in the world, so far refined, could be placed in a single cube 60 ft. on a side. It is metallic, with a yellow colour when in a mass, but when finely divided it may be black, ruby, or purple.
There main problem is that they love each other but were born into rivaling families.