Advantage of ownership in severalty is:

Sharing risk is typically associated with joint ownership arrangements where multiple parties hold interests in a property. In severalty, the owner bears all the risks and liabilities alone, which can lead to greater exposure rather than shared responsibility. Hence, this option does not apply to ownership in severalty.

Joint decision making is characteristic of co-ownership arrangements, such as partnerships or joint ventures, where multiple owners must collaborate and agree on property-related decisions. This contradicts the essence of ownership in severalty, where the individual owner has sole authority and does not need to negotiate with others.

While ownership in severalty may involve higher risks due to the sole responsibility for the property, this is not an advantage. Rather, it highlights a potential disadvantage since the owner must manage all risks without the support of co-owners to mitigate financial burdens or liabilities.