Some students were building models of solids, liquids, and gases by gluing plastic balls to a sheet of cardboard. which of their models best shows the particles in a solid?

Below picture contains the given models.

            Option-B is the correct model.

Explanation:
                   Solid is a state of matter in which the particles are closely packed, has definite volume and shape. Like liquids they don't flow, either they occupy the volume of container as that occupied by both gases and liquids. The inter-molecular forces between solid particles are very strong as compared to liquids ans gases. So, the model B has a particles very closely packed to each other.

They are like other investigations? say there was a murder u have to do blood test and finger prints which run through a lab.