Here you need to put if you have any questions about the material you are learning. If you have none i would consider putting that you have none.
The answer is osteoporosis
Osteoporosis is a condition when the bone(osteo) density is decreased, makes them look like having pore or spongy. It is found frequently in the elder woman that has been menopause for a few years.
Estrogen has a role in bone remodeling which causes a protective effect on woman before menopause.
The mother is a carrier of the genes to make a thick unibrow. Two of Michael's children will have thick unibrows if he has children with someone with thin, separated eyebrows.
Using a better car with less pollution