Help me plz plz b

The respiratory system is the network of organs and tissues that help you breathe. basically your airways, lungs, and blood vessels so you quite literally need these to survive I mean your muscles need oxygen to function and your brain needs oxygen to function so without your respiratory system you wouldn't be able to move much and you would quickly pass out and die from the lack of oxygen to your brain there are other body processes that need oxygen as well but these are just two examples.

Explanation:

Maybe it’s dark

Explanation:

Hm

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )

a is the correct answer