Option 1 -> equality - Gender equality would be a positive development, not something "alarming" or a "cause of concern."
Option 2 -> distinction - While this means difference, it's too neutral and doesn't convey the negative severity indicated by "alarming."
Option 3 -> disturbance - This implies disruption but doesn't appropriately describe systematic differences between genders across fields.
Option 4 -> disparity - This means inequality or gap, which fits perfectly as gender disparity is indeed alarming and concerning.
Hence, Option 4: disparity -> The word "disparity" refers to inequality or significant differences between genders in opportunities, treatment, representation, or compensation across various fields. This is indeed considered alarming and a major social concern that needs to be addressed -> correct