Filters on prospects

Filters on prospects

Hi everyone, im a beginner on Zoho,

I have already imported some prospects from an excel board with different categories like names, phone number, activities... But my problem is that when i want to filter my prospects, Zoho propose to filter with the title of the column "Activities" for exemple instead of the things bellow like "industry","Chemistry","Electronic".

I don't know if im clear with my explanations but if someone as the solutions let me know.

Thank you