Describe different types of mutations

Which of the following is not a potential result of deforestation?

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim

Which is one example of a phenotypic change that is not genetic