Answer:
Observation.
Explanation:
Observing something is watching it, and taking in data based on what that person/thing is doing. Waldo clearly observed her father and took in this data making her not need to be taught the art of gardening. This is why she is good at it. Hope this answer helped :)
Alexander the Great became king when his father died in 336 BCE
Idek but I think because everyone works together better