Domesticated plants and animals:
a. can readily survive in both cultivated and wild (natural) settings.
b. are characterized by high genetic diversity.
c. tend to lose genetic diversity as the farmer selects for more desirable agricultural characteristics.
d. are less likely to succumb to new strains of disease-causing organisms.
e. readily adapt to changing environmental conditions.

option C - tend to lose genetic diversity as the farmer selects for more desirable agricultural characteristics.

Explanation:

The farmer carry out SELECTION of the plants and animals with the MOST desirable traits, and over time they supervise their breeding with one another, and Selecting again from the offspring, which finally leads to the ELIMINATION of GENETIC DIVERSITY (varieties of traits) among successive generations

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.

the answer is definitely a