Question

the indian constitution passes through changes since its adoption. what does it show

Answer 1

There variation or repeal of any part of constitution by the parliament under its constitutent power, is called amendment of constitution.
It shows and reflects that every citizen of India have The right to freedom of speech and expression and also clarifies that the right to equality doesn't bar the enactment of laws which provide "special consideration" for the weaker section of society.
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