Final answer:
Anahi has floating ownership because she needs to provide a unit number and a start date, which is characteristic of this type of timeshare ownership that offers flexibility in choosing dates.
Step-by-step explanation:
Anahi seems to have a floating ownership as indicated by the need to provide a unit number and start date to deposit in the Guide Portal. Fixed ownership would have a specific week assigned each year, eliminating the need for a start date, while floating ownership allows the owner to choose from available dates within a certain range, hence the required information. Umbrella ownership and lock-off ownership do not specifically pertain to the type of time assignment for the use of a property.