Question

list two factors which may be responsible for the loss of grains during storage

Answer 1

if a sake is stored for a long time and no one is aware of it, it gets spoilt and a large amount is wasted.
when filling up the sakes , a large amount falls down

Answer 2

storage loss, agriculture production can be high , the two factor responsible for loss of gains are biotic and abiotic
biotic = fungi,Bactria , insects , pests etc
abiotic == moisture, or temperature of place where grains store