I understand (I think) why lift reduces in a stall.
What I don't understand is why drag increases. I can see that the ratio of drag to lift would increase, but I'm not sure I understand the mechanism that leads to an absolute rise in drag.
Lots of sources mention it, but they just refer to turbulence or vortices or similar without really explaining how those phenomena cause the drag to increase.
Is this an increase in induced drag or parasitic drag? I think I could understand if it was just increased parasitic drag.