Question

how constitution helps in promoting national integration?

Answer 1

Our preamble mentioned about securing integrity of the nation.The fundamental duties provisions reinforces duty upon citizens to preserve unity and integrity of the nation.Apart from that the Constitution features envisages federal structure with unitary bias such as
1)Governor rule on break down of constitutional machinery(Article 356)
2)Concurrent list,union list
3)Integrated judiciary
4)All India services(Article 312)
5)National emergency
promote integrity of the diverse idea of INDIA

Answer 2

Hello mate!!
here is your answer $$$
Our Constitution contains preamble. It contains ideas related too nationalism. It contains beliefs of constitution like secular,sovernigity,democratoc,etc.The preamble of our constitution regrets people about nationalism.

HOPE!!!! $ This helps.