Why did China seem to break up into warring kingdoms so often?

Religion, Morality, and leadership, these waring kingdoms had a lot is common in opposed to vital things for a society such as religion and morals.

  China hasn’t always been just one country. It used to be a lot of smaller kingdoms who wanted to gain control of a big country. And so they fought over it.  China is also REALLY big. When that happens, it’s really hard for a king to keep control, so if one lord wants to start his own army and rebel, it can be hard to stop.

Explanation:    

                      if i'm wrong i apologize

the median of the data is 4.

step-by-step explanation:

the median means the middle number of a given number.

to decide which one is the median, arrange in ascending or descending order. but sometimes, you may find two(2) number in the middle, but it's easy, just add them together and divide by 2.

so,   determine the median of the data. 2, 3, 3, 4, 5, 7, 9

it is already arranged, count 3 times forward and 3 backward and the one left is your answer.

2,3,3,4,5,7,9

our answer is 4.

hope this !