Deena's family has rented a boat and they are going out on the water for their first time together. The safety procedure Deena's family should follow is to have a life jacket for: All family members on board the boat All non-swimmers on board the boat All persons under 18 on the boat Every 2 persons on board the boat

B. All non-swimmers on board the boat.

Step-by-step explanation:

A life jacket is a safety material that guides against sinking of the user in water body. Its major use is to avoid sinking by supporting the floating ability of the user on the surface of water (e.g river, sea, ocean etc).

Thus, Deena's family should ensure that all non-swimmers on board the boat make use of the jacket in case of accident. Since most swimmers have the capacity to float on the surface of water, they mostly can support themselves on water.