Answer:
higher altitudes have a lower level of oxygen which in turn, trains your lungs to hold and breathe more oxygen which also helps you cycle, run, etc. longer than usual
Explanation:
Just look it up on the internet
Answer:
Phytoplanktons are photosythetic organisms found near ocean surface and provide food to a wide variety of sea creatures like whale, shrimp, jelly fish etc. They also rely on nutrients such ad nitrates, phosphate for their development. They maintain a balance ecosystem and food web in ocean.
