Question

sloan just arrived in space for a stay aboard the iss, and she noticed that her face feels and looks incredibly swollen. why does this happen?
because the spacesuit is so tight that the fluids must temporarily go to your head to make it fit
because the suction in the space helmet pulls all the fluids to your head
because the pressure in the spacecraft causes your ears to pop, creating swelling
because all the fluids in your body rush to your head upon arrival in space

Explanation:

In space, the lack of gravity causes fluid redistribution in the body. Normally, gravity pulls fluids down, but in microgravity, fluids shift upward, including to the head, leading to facial swelling. The correct option explains this fluid shift upon arriving in space. Other options are incorrect: spacesuits (except during launch/entry) aren't overly tight to force fluid, space helmets don't have suction pulling fluid, and ear popping from pressure doesn't cause facial swelling.

Answer:

because all the fluids in your body rush to your head upon arrival in space