Question

select the best evidence to support the statement that it takes astronauts a while to prepare for a spacewalk. when astronauts go on spacewalks, they wear spacesuits. spacesuits protect spacewalkers from the harsh environment of space. they protect astronauts from extreme hot and cold temperatures, harmful space dust, and radiation. spacesuits also give astronauts oxygen to breathe and water to drink during spacewalks. the suits are pressurized. this means that the suits are filled with oxygen. spacesuits are pressurized to keep the fluids in the body in a liquid state. once in their suits, astronauts breathe 100 percent oxygen for several hours until all the nitrogen is out of their body. nitrogen in the body during a spacewalk can cause gas bubbles to form in the body. this condition is called \the bends.\ adapted from nasa, \what is a spacewalk?\

Explanation:

The key evidence must show a time-consuming preparation step for spacewalks. The text states astronauts need to breathe 100% oxygen for several hours to remove nitrogen from their bodies, which is a lengthy preparatory process.

Answer:

Once in their suits, astronauts breathe 100 percent oxygen for several hours until all the nitrogen is out of their body.