The strength of your trunk or (core )including abdominal, low back, and postural muscles.
I say c. cause it is show casing more then one
It is the tropesphere. Hope i helped :)
<span>They benefit from having the respiratory </span>system<span> give oxygen and take away carbon dioxide. Muscle </span>cells benefit<span> by having circulatory </span>system<span> bring them blood and oxygen. The heart pumps blood towards the arteries, arteries carry blood to the </span>cells<span>.</span>
