Answer:
B. Describing the struggles of the urban poor.
Step-by-step explanation:
Charles Darwin was a novelists who used fiction to criticize the economic and social struggles faced by urban working class during the period of Industrialization.
Most of his works reflected the poor conditions of the urban people and the struggles of their everyday lives. His works like 'Hard Times', 'Oliver Twist' and 'David Copperfield' all consists of various elements of social criticisms.
Thus, Charles emphasized on the conditions of the poor people around him through his writing and novels.