Lara is a forensic anthropologist. while examining an arson crime scene, she found materials that she thought were bones. however, the materials were too fragmented and obscured to be certain. which procedure should she perform to find out if they are bones?

a. conduct gross examination
b. study of human anatomy
c. determine the calcium-phosphorus ratio
d. try to put the pieces together

The procedure Lara should perform to find out that the materials are bone is :

C. Determine the calcium -phosphorous ratio .

Explanation:

Arson crime includes burning or charring of the victim or victims property willfully.Thus here Lara Got specimens which were burned.Since Lara doubts that the materials she found were bones , she should carry out a calcium - phosphate ratio of the material.As, bones have calcium and phosphorus as the major elements in them.Bones contain an inorganic salt of Calcium  and phosphate known as bioapatiteThis compound is reported to change into crystalline hydroxyapatite when bones are burned.This compound can be used to determine the Ca- P ratio.Thus the chemical  analysis will determine whether the samples are bone or not.

From a high concentration to a low concentration.