Based on this information, what is Abby's phenotype for the fur texture trait?

 - soft fur
 - rough fur
Abby's genotype for the fur texture gene is ff. Abby's genotype of ff has only f alleles. The f allele is for soft fur. So, Abby's phenotype for the fur texture trait must be soft fur.
To check this answer, consider whether Abby's alleles are dominant or recessive. The allele for rough fur (F) is dominant over the allele for soft fur (f). This means F is a dominant allele, and f is a recessive allele.
Abby's genotype of ff has only recessive alleles. An organism with only recessive alleles for a gene will have the recessive allele's version of the trait. So, Abby's phenotype for the fur texture trait must be soft fur.