Answer:
B. surveying
Surveying is the method of determining the distance and elevation using instruments and geometry.
Step-by-step explanation:
Surveying is methodology used to determine the area of the land in real estate sector and infrastructure projects. It is the coalescence of mathematical calculation and scientific concepts. It not only measure the area size, which is also used to measure the elevation like height of Himalayan mountain, dam strength and so on. Survey of India is established in 1767, it is the oldest department in India in engineering field.