We know the streamlined bodies shown in the figure above are examples of homoplasy. if the following groups also had streamlined bodies, which of the groupings would give the most support to this body type being homologous?

It seems that you have missed the necessary options for us to answer this question, so I had to look for it. Anyway, here is the answer. We know the streamlined bodies shown in the figure above are examples of homoplasy and if the following groups also had streamlined bodies, the groupings that  would give the most support to this body type being homologous is this:  lizards, pterosaurs, dinosaurs, birds, synapsids, monotremes, marsupials, rodents, and primates. 

Amethod of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.