Which is an example of an instinct? A rabbit hides when it observes a predator.
A dog wags its tail when it hears a doorbell ring.
O A boy pulls his hand away after touching a hot surface.
O A dolphin swims through a hoop during an amusement park show.

this is a good question! i'll do some research and come back when i have the answer!

if you know your abc's you should be able to get your answer or just use google

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.