Answer:
The correct option is A. famine
Step-by-step explanation:
Selective breeding can be described as a process in which organisms carrying the desired trait are grown so that offsprings carrying the desired traits can be produced more in number. The method of selective breeding will be helpful to produce a large number of crops with desirable characteristics. Hence, selective breeding is an efficient method to control conditions like malnutrition or famine.
Other options like option B is not correct because the method of selective breeding is not effective to control the population.