annāt — from grains; bhavanti — grow; bhūtāni — the material bodies; parjanyāt — from rains; anna — of food grains; sambhavaḥ — production; yajñāt — from the performance of sacrifice; bhavati — becomes possible; parjanyaḥ — rain; yajñaḥ — performance of yajña; karma — prescribed duties; samudbhavaḥ — born of.