What best describes the blood flowing in an artery

When deciding to become a parent: a. the only thing that matters is the desire to have a child. b. the most important thing is whether or not you are financially ready. c. you should be ready to support and nurture a child. d. you have no choice; "nature" decides if and when you will have a child.

Articular cartilage to shocks and prevents friction between parts.

Describe some of the common health conditions associated with air pollution.