Gently tapping the chest with the fingers to determine the position, size, or consistency of the underlying structures is called: question 83 options:

Percussion

Explanation:

Percussion is one of the five methods (Palpation, Inquiry,auscultation, inspection & percussion)  of clinical examination which is used to determine the structures underlying any surface by tapping on it slowly with fingers, any light & small instruments, hands etc.

It is commonly used for assessing the condition of thorax and abdomen. By using this method a physician is able to drive information regarding the size , border, consistency, fluid presence etc. of underlying structure.

equal distribution i think.