Answer:
A). Specialization
Step-by-step explanation:
Specialization is defined as 'the act of focusing upon a particular skill, product, or field' and this is the factor associated with the agricultural sector that allows each of the sectors to yield maximum efficiency while performing the tasks. This process helps in centralizing the resources(the process of integration of specialized production) like land, capital, labor on the production of a selected variety of goods. Thus, each sector is able to concentrate upon the new techniques or methods to ensure its maximum efficiency without any change and hence, option A is the correct answer.