Answer:

Studying embryology helps scientists understand (C.)the early stages of an organism's growth.

Explanation:

It involves the study of how organisms develop from a single cell into a complex, multicellular organism. By examining the processes and structures involved in embryonic development, scientists can gain insights into the evolution of species and the mechanisms that drive development and differentiation. Embryology is also important in medical research, as it provides a foundation for understanding the genetic and environmental factors that contribute to developmental disorders and birth defects.