Arteries generally carry oxygen-rich blood.
Energy levels can plummet due to lack of oxygen-rich red blood cells.
Arteries are needed to maintain energy levels .
_ are needed to maintain energy levels 
Options:
[a] Ligaments
[b] follicles
[c] hydration
[d] environment
[e] glucose
[f] pores
[g] exercise
[h] Arteries