According to Maslow's Hierarchy of Needs, which level of needs includes self-fulfillment and enriching experiences?

Self actualization needs

Explanation:

Self actualization needs is at the peak of the Maslow's Hierarchy of Needs, i.e. the highest level of psychological development. At this point, all mental needs and basic needs have been fulfilled and then there is a desire for self fulfillment and enriching experiences. There is a drive to  fully realize one's potential and become all one is capable of becoming.

At this stage people tend to be natural, spontaneous, comfortable with solitude, socially compassionate etc.

explanation:

may i ask what challenges?

answer; eliminate parking problems in cities, because a car took up only half as much space as a horse and buggy;