this is just my idea but it looks like natives bringing gifts to spaniards i can kinda tell because of their hats and swords the natives are holding gold jewelry while the spaniards are holding swords and pikes/spears
Answer for question 1 : It looks like The Indians ( I'm going to be honest I have no idea what the ethnicity is) is giving the settlers their gold. It looks like they are being forced to. Or that they are trading resources.
Answer for question 2 : no idea ( I'm very sorry)
Answer for question 3 : Both parties look like that they have gold on them.
C. Artesian. An artesian well is simply a well that doesn’t require a pump to bring water to the surface; this occurs when there is enough pressure in the aquifer. The pressure forces the water to the surface without any sort of assistance.