The purpose of survey was to know the , the soil quality, the flora, the fauna, the local histories, and the cropping pattern all the facts seen as necessary to know about to administer the region.

TOPOGRAPHY

Explanation: Surveys became a common practice under the colonial administration in india  because The British believed  before a country could be effectively administered, it was necessary for such countries to be extensively known therefore, by the early nineteenth century extensive  surveys  such as botanical surveys, zoological surveys, archaeological surveys, anthropological surveys, forest surveys were being carried out to map the entire country.

In the villages, revenue surveys were carried out to know  the topography, the soil quality, the flora, the fauna, the local histories, and the cropping pattern – all the facts seen as necessary to know about to administer the region. Also, the  end of the nineteenth century marked the  Census operations which were held every ten years, providing extensive records of the number of people in india provinces, taking into account thier castes, religions and occupation.  

well i'm late but i think its: b, c, and e

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.