Question

what is unity and diversity ​

Answer 1

Unity in diversity is a concept of "unity without uniformity and diversity without fragmentation"[1] that shifts focus from unity based on a mere tolerance of physical, cultural, linguistic, social, religious, political, ideological and/or psychological differences towards a more complex unity based on an understanding that difference enriches human interactions. It has applications in many fields, including ecology,  cosmology,  philosophy, religion and politics.

Answer 2

unity mean living together and diversity means a range of different things