Answer:
The correct answer is C improve agricultural technologies to increase crop yield.
Explanation:
Genetic engineering is the heart of molecular biology.Genetic engineering is used to produce various genetically modified plant to improve crop yield.
To do this many procuderes of recombinant DNA technology is applied to make the crop herbicide resistant,parasite resistant,flood resistant,drought resistant etc.Beside this maximum hybrid crops are planted to increase the crop yield within a small period of time.This ultimately decreasing the nutritional value of food value of the crops.
Beside this many chemical fertilizers are being used to increase the crop yield but the more usage of chemical fertilizers decreases the fertility of the soil.