The correct answer is c. smoke stacks.
Smoke stacks are chimneys or funnel shaped structures which emit smoke from a factory, vehicles and industrial set ups. Smoke stacks mostly discharge carbon dioxide and water vapor and oxides of nitrogen into the atmosphere. The exhaust released from smoke stacks cause air pollution. Air pollution can cause ailments like asthma and cancer. Thus, smoke stacks are not a source of water pollution.
Well you should know about a punnet square, so anyways you have the result of the punnet square, if you have a dominant allele then the phenotype would be that allele, while the genotype is the dominant and either a recessive allele or a dominant allele.
Hello!
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