What is a dense membrane composed of nerves, blood vessels, and bone-producing cells that facilitates growth in the diameter of a bone and also provides the point of attachment for tendons.

Periosteum

Explanation: tough membrane composed of fibrous connective tissue that closely wraps all bone. It contains nerves, blood vessels, and bone-producing cells. Inner surface provides the materials for nutrition repair and facilitates growth in the diameter of the bone. Fundamental Role in movement by providing the point of attachment for tendons.

to take away from

explanation:

answer:

i don't believe the ocean is purple, but it might once have been:

as for the sky, according to nasa:

"sunlight reaches earth's atmosphere and is scattered in all directions by all the gases and particles in the air. blue light is scattered more than the other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time."