Final answer:
The group most in need of protection and care from family members due to being frail and distressed is the elderly person. This is because elders may require assistance with basic functions and care due to physical frailty, which makes them dependent on others.
Step-by-step explanation:
The question is asking to identify which group among the listed is most in need of protection from other family members due to being frail and distressed. Considering the information provided, the answer would be (1) Elderly person. Elders can become physically frail and may require assistance with basic functions and care due to the biology of aging. Unlike children, who are naturally dependent, the elderly have had a lifetime of independence, making their dependency due to age a more complex transition. Cultural perceptions and economic factors can also impact the care of the elderly. In contrast, infants, while vulnerable, are expected to be dependent, and a variety of systems and cultural practices surround their care.