A BCBA wants to teach a child how to wash her hands. The BCBA has an RBT who works for the company demonstrate washing hands, and the BCBA meticulously takes notes as to each step of the hand-washing procedure. For example: 1) push up sleeves; 2) turn on both faucets; 3) adjust water temperature; 4) check water temperature; 5) readjust temperature if needed; etc. The BCBA is using a procedure.

Total Task Chaining  

Explanation:  

  The total task chaining is one of the type of procedure that helps in completing the overall sequence process and also receive the reinforcement while completion of the given task.

The main objective of the total task chaining process in which the various types of Learner developing the prerequisite skills that helps in completing the given task and does not required any type of trail process.

According to the given question, the BCBA is basically wants to teaching the children the procedure of the washing hands and give a demonstration on this so the BCBA is using the total task chaining procedure.

Therefore, Total task chaining is the correct answer.  

they protect against unsafe foods and medicines being sold

explanation:

answer; you can turn right on a red signal (when posted);