is defined as a chronic lung disease caused by cigarette smoking and is characterized by difficulty in breathing and shortness of breath.

Lung cancer because once you smoke, the toxic chemicals build up in each lung sack causing it to build up over a period of time and can have breathing difficulties and can lead up to cancer

the statements that apply here about binary star system are

"have stars that might appear to wobble"

"often have one star that is brighter than other"

a binary star is a star system consisting of two stars revolving around their common barycenter. systems of two or more stars are called multiple star systems.

answer///africa and asia;