In which part of the scientific method do you evaluate your experiment?
purpose
experiment
analysis
hypothesis

You evaluate your experiment when you do the experiment because when you do the experiment, you put your hypothesis to the test, and that is then the purpose of the experiment. The analysis part is when you draw your conclusions and say if your hypothesis was right or wrong and you figure that out when you are doing the experiment. 

I hope this helped :)

Predator instincts is what causes it

This is the most closely resembles the model.