Explain how muscles are effected by space travel

Hopes this helps:

Because astronauts work in a weightless environment, very little muscle contraction is needed to support their bodies or move around.
Without regular use and exercise our muscles weaken and deteriorate. It’s a process called atrophy.

Have a great day.

B) as the temperature increases, the kinetic energy of the particles increases.|-/

The answer is that they are composed mostly of liquid water.