Because they change over time
The scope of pharmacognosy is broad in the field of pharmacy, The origin is derived from two Greek words: pharmakon, and gnosis (knowledge). Pharmacognosy forms an important part of pharmaceutical research and development.
*Sigh* It's important because conserving energy helps the environment and lets you have a little more pocket money when the bills come around.
I believe it’s b but correct me if I’m wrong
