Answer:
Cholera is a bacterial disease usually spread through contaminated water. Cholera causes severe diarrhea and dehydration. Left untreated, cholera can be fatal within hours, even in previously healthy people. Modern sewage and water treatment have virtually eliminated cholera in industrialized countries.
Explanation:
The correct answer is option b, that is, a polygenic trait that is affected by the number of alleles present.
There are three genes associated with a usual form of glaucoma, so it must be the polygenic trait, that is, it comprises more than one gene. The polygenic traits are affected by the number of alleles. In this circumstance, there are more than twenty genetic loci present, which signify that there must be a larger quantity of alleles for all the loci.
The answer is the 3rd choice, cells eliminating of waste