to simulate the air pressure of Earth to help astronauts float in outer space to protect astronauts from solar radiation to provide an oxygen supply for breathing
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Why is a spacesuit inflated like a balloon?
Possibilities:
- to simulate the air pressure of Earth
- to help astronauts float in outer space
- to protect astronauts from solar radiation
- to provide an oxygen supply for breathing

to simulate the air pressure of Earth