The correct answer for this question is short-term memory.
What exactly is short-term memory loss?
Short-term memory loss happens when you forget about recent events, such as something you did, saw, or heard. A variety of factors can contribute to it, including nutritional deficiencies, sleep deprivation, depression, medication side effects, or dementia.
Dementia is a general term for the impaired ability to remember, think, or make decisions, which interferes with daily tasks. Alzheimer's disease is the most common type of dementia.
The complete question is:
Which type of memory capacity changes during old age, and especially slips around age 70?
a) long-term memory
b) implicit memory
c) short-term memory
d) episodic memory
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