The correct statements about photographs by Eadweard Muybridge are:
- They were the first stop-action photographs.
- They show people and animals in motion.
- They proved one leg of a horse remains on the ground at all times while running.
- They could be animated in a zoetrope or animated and projected in a zoopraxiscope.
All four statements are true regarding Muybridge's contributions to photography and motion studies.