You didn’t post the statements but I’ll still answer this since I know this question.
Answer: Members of the same species battle each other to protect their young
C, they are all made of cells
Most organisms in the top levels of an energy pyramid require more food than those on lower levels. On top of this, each level of the pyramid looses energy gained from food. This means that there needs to be more lower leveled organisms for the ones on top to eat in order to gain enough energy. Because of this, there's only enough food for a few of these types of organisms.
I hope this helped! There are probably a few more details you can add, but this is the overall reason :)
Infectious diseases.Infectious disease in the nervous system can have very serious effects on the body's functioning and movement. Especially when this goes on for many months. Two types are bacterial and viral infection.Thank you for your question. Please don't hesitate to ask in Brainly your queries.