PLease help will give brainliest Which marine ecosystem is among the most productive and found globally in cold nutrient-rich waters?

Coral reefs
Intertidal zones
Kelp forests
Neritic zones

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?

After frida stops exercising, she continues to breathe heavily. what is most likely occurring in her body? heavy breathing during exercise has produced an oxygen surplus in her muscles. this oxygen is being transported to her lungs. this is a result of aerobic respiration. heavy breathing during exercise has produced a carbon dioxide surplus in her muscles. lactate is being transported to her liver. this is a result of aerobic respiration. strenuous exercise has caused her body to be in carbon dioxide debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration. strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. this is a result of anaerobic respiration.

The pelican's beak is adapted for in .