Question

Which other relationship in model 2 is similar to that between a dog and flea?

Answer 1

There is no model 2 so the answer is "there aren't any Model 2 but there is Model 1".

I have done this science HM.  :]

Just kidding the last Answer of model 2 is similar beacuse the first is parasitism

So, the last answer is similar!

Answer 2

There is no model but a good example of that kind of relationship is mosquitoes to horses or humans