Which of the following is not a model of the solar system ?

The image shows embryos of three vertebrate classes

The hematodinium parasite becomes less of a problem for the blue crab when the crab is very young. fishing is thriving in the region. the crab moves to less salty water. a significant percentage of the population is impacted.

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?