Answer:
I believe it would be biotechnology
Step-by-step explanation:
Botany - the scientific study of plants, including their physiology, structure, genetics, ecology, distribution, classification, and economic importance.
Bioecology - the branch of biology that studies the relationship among different living organisms and their environment
agronomy - the science of soil management and crop production.
biotechnology - the exploitation of biological processes for industrial and other purposes, especially the genetic manipulation of microorganisms for the production of antibiotics, hormones, etc.