The correct answer is D. inequality.

The growing disparity between the rich and the poor has been a cause of global concern. This is because inequality can lead to a number of problems, such as social unrest, crime, and political instability. It can also make it difficult for people to improve their lives, as they may not have access to the same opportunities as those who are wealthier.

A. similar is not the correct answer because it does not describe the growing disparity between the rich and the poor. The rich and the poor are not becoming more similar; in fact, they are becoming more and more different.

B. diversity is not the correct answer because it does not describe the growing disparity between the rich and the poor. Diversity refers to the variety of people and cultures in a society. The growing disparity between the rich and the poor is not about diversity; it is about inequality.

C. segregation is not the correct answer because it does not describe the growing disparity between the rich and the poor. Segregation refers to the separation of people based on race, religion, or other factors. The growing disparity between the rich and the poor is not about segregation; it is about inequality.