Answer:
The answer should be C.
An energy pyyramid shows how the energy "flows" from organism to organism as it goes up.
Firstly light is an external stimuli. in plants - shoots are positively phototrophic while roots are negatively phototrophic.
Active:requires the assistance of a carrier protein, also requires energy
Passive:does not require energy is also movement of ions and other atomic and other molecular substances.
Answer:
D, over the past Billions of years, our atmosphere has formed to protect life.