Because keeps your heart running and blood flowing also help not get over weight which could to high blood pressure and Diabetes, heart problems, etc.
Exponential growth. Which is represented by a J curve.
Without resources acting as a limiting factor for the population the population will be able to grow exponentially.
I think the best answer is B, bc the nervous system sends messages to each body part, allowing it to move.
Hope this helped, have a nice day :)
The answer is Heterospory
Photosynthesis is when a plant converts sunlight into energy, and cellular respiration is when cells convert food into energy.