Question

give reason:yeast is added to the batter used to make dosas

Answer 1

Hey buddy, here is the answer you were looking for........
Yeast is added to the batter used to make dosas because it speeds up the process of fermentation by:—
1)Fragmentation
2)Budding
3)Fission

Another reason is that it releases CO2 and hence adds fluffiness and taste to the dosas.

HOPE IT HELPS YOU DUDE ✌✌✌