Final answer:
If an elder is only fed once a day by his grandson, it is considered an act of neglect, which falls under the form of elder abuse known as caregiver neglect.
Step-by-step explanation:
When an elder states that his grandson only feeds him once a day, this can be categorized as neglect, which is a form of elder abuse. Neglect is identified as one of the major categories of elder abuse. It involves the failure to provide adequate care for the elderly, which can include inadequate food, hydration, sanitation, or necessary medical treatments. Given that food is a basic need, providing insufficient nourishment constitutes neglect. Elder abuse can occur in various forms, such as physical, psychological, sexual, and financial, but in this specific instance, the situation described would likely be considered an act of neglect by the caregiver.