I want to create object like this:
How can I achieve this?
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An alternative way, just to add to the catalogue found by Prashant in another question:
Make a "blank" rotation (0°) to adjust the falloff
Then in top view
Finally, add a cast modifier and let it to sphere with a factor of 1:
Edit: FYI, that can be done with a single subdivided segment kept horizontal. Rotate with linear falloff and grab Z with spherical falloff.