Okkkkkk...let me ease dumi's work a little bit :D
Equality can be defined as a leveling process through which the differences between people are minimized. It is essential to achieve equality despite people's differences in terms of their nationality, voice, color, origin, religion, sex and age. To promote equality we need to provide equal and adequate opportunities and equal rights.
Yes, here you have a good hook which is;
Equality can be defined as a leveling process through which the differences between people are minimized
Now let's come to the background of the intro;
It is essential to achieve equality despite people's differences in terms of their nationality, voice, color, origin, religion, sex and age.
This is pretty good, but I (may be dumi too) feel you can align this more with the topic. Tell there is an issue that equality does not exist and we need to make some effort to bring it among people. The issue part is not properly conveyed to the reader.
To promote equality we need to provide equal and adequate opportunities and equal rights.
Since this is not an agree/disagree essay, this is fine for the conclusion of your intro.
Hope this helps you
You have excellent writing skills :)