An inflammation of the tissue under the foot (fascia) caused by overuse and improper athleticfootwear. characterized by intense "start up" pain under the heel bone:
a) pronation
b) plantar fasciitis
c) osteoporosis
d) osteoarthritis

.An inflammation of the tissue under the foot (fascia) caused by overuse and improper athletic footwear and  characterized by intense "start up" pain under the bone is called plantar fasciitis.

 The plantar fascia is the thick tissue on the bottom of the foot. When this tissue becomes swollen or inflamed, it is called plantar fasciitis.
Pain is the main symptom and usually, the pain will ease in time