Bg 3.14

annād bhavanti bhūtāni
parjanyād anna-sambhavaḥ
yajñād bhavati parjanyo
yajñaḥ karma-samudbhavaḥ

Word for word: 

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.

Translation: 

All living bodies subsist on food grains, which are produced from rains. Rains are produced by performance of yajña [sacrifice], and yajña is born of prescribed duties.

Earlier we had discussed how the Vedic understanding of the universe being controlled by conscious beings the devatas is not contradictory of the scientific understanding of the universe operating according to mechanism but these are complementary. We will discuss another example to conclude this.

annād bhavanti bhūtāni, all living entities subsist on grains. And where do grains come from parjanyād anna-sambhavaḥ, so grains come from rains. 

Parjanyā is also the name of father of Nandha Mahara. 

parjanyād anna-sambhavaḥ, so they were dependent on cows and cows needed grass so in that sense name related are natural.

yajñād bhavati parjanyo, so where does grains come from?

Grains come from Yajna, and

yajñaḥ karma-samudbhavaḥ, Yajna comes from Karma.

This and next verse are related to we will discuss both together.