Final answer:
A reversion estate is created when the original fee simple owner grants a life estate and reserves the right to get back the estate when the life estate terminates.
Step-by-step explanation:
If the original fee simple owner grants a life estate and reserves the right to get back the estate when the life estate terminates, this is a reversion estate. In this situation, the original owner retains the right of reversion, meaning that when the life estate ends, the ownership of the property reverts back to the original fee simple owner. This is different from a remainder estate, where ownership passes to a third party when the life estate ends.