Hormones in the bloodstream (a) energy (b) chemical messenger (c) structure of cell member

b) chemical  messenger

Explanation:

hormones are known as chemical messengers  which are released in the blood and responsible for performing many  functions affecting the cells. The cell will respond to the release of the hormone due to the presence of receptors on the cells and perform specific function.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.