Answer:
To make a boundary line and avoid conflict in the future.
Step-by-step explanation:
McMahon line was introduced between china and India in order to locate boundaries of both countries and to avoid conflict between two countries on this issue. This line was drawn by the chief British negotiator, Sir Henry McMahon on 1914 at Shimla conference. This line was named McMahon line on the person who draw this line between two countries i.e. china and India.