I believe the answer is: Wisdom
Wisdom influences our ability to use the knowledge that we have in order to make a good judgment.
As we got older, our brain's function will deteriorate. But, older people tend to accumulate more experience compared to the younger ones. Those experiences will provide older people with knowledge that might not be known by younger people. They could use it as a core strength to make better judgments than younger people.
Explanation:
The can find out by observing the child's behaviour.
To advise the President on any subject he may require relating to the duties of each member's respective office.
