Your friend says the following to you: "The lungs are the main part of the respiratory system. You really don't need the rest of the other organs [in the respiratory system]." Prove this to be a false statement.

This statement is false because the respiratory system includes  muscles that power your lungs. These muscles work together to move oxygen through your body and it cleans out waste like carbon dioxide.

The respiratory system also allows us to speak and smell. So we clearly need all of the organs in our respiratory system.

the reason the two sea urchins don't compete with each other for food, resources, etc. is because the urchins have adapted to the environment but they have also adapted to each other. this is most likely because the genes of the sea urchins.

hello

answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this