Samples of blood were mixed with different sodium chloride solutions. In one concentration of sodium chloride, the red blood cells were observed to maintain their normal shape. In another concentration of sodium chloride, the red blood cells were observed to swell and burst. The cells which maintained their normal shape were in a state of homeostasis.

the main thing i would use is bricks because if there is a hurricane, there is a great possibility for the house to still stand. and i would also use plexiglass windows instead of regular windows because plexiglass isn't prone to breaking.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves

it is a. i hope this .