A collection of air or gas in the pleural cavity, resulting in a collapsed lung, describes a condition called a. emphysema. b. bronchiectasis. c. pneumoconiosis. d. pneumothorax.

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

not sure if this what   you'r looking for would be percent composition

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.