How does the location of a mission show human environment interaction?

Mission tends to be placed or located at places that are near to large streams or water bodies such as rivers. They also choose these places as they are flat areas and fertile which is good for farming.

farming is an important thing because this is one of the main ways by which people fed themselves and they taught the willing Native Americans converts.  All the missions that appeared during the time we had to adjust as well as adapt to the location and environment that surrounds them. but they did not have the power or capacity to change the environment according to the needs of the people.

the answer to your question is:

strong-mayor system