A map's legend explains its markings and symbols
It’s number 3 or C that is you’re answer
Answer:
I'd say 1 is the most viable answer
Humans are the activators, the catalysts, and the dreamers. They preside at the foundation of important industries such as healthcare, education, or energy, to name a few. These large-scale service ecosystems rely on humans who understand how such sectors impact quality of life.