ethan, a five-year-old with autism, often rocks back and forth repetitively. he also gets upset if he cannot follow each step of his familiar routines. a possible source of repetitive or ritualistic behavior is .

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 !

this would be b. giving reasons for a belief

how did lincoln attempt to peacefully resolve the question of whether to resupply fort sumter?

(a) by sending unarmed supply ships to the fort