For glass fragments to be individualized, what must be true?

a. they must fit together
b. they must have the same density
c. they must look the same
d. they must be the same color

The answer is :

They must fit together.

Explanation:

The analysis of glass fragments can be beneficial in determining cases such as hit and run, burglaries, kidnappings, and bombings. The use of glass as "evidentiary material" rests in its original characteristics such as:

It is a delicate material that is often broken and hence usually found in various types of crime scenes.

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.