Environmental portraiture is photos/portraits of someone in their environment so either someone is their work or maybe a hobby that they do a lot you want something that shows an aspect of who that person is.

You want your photos to tell a story the story behind the person in it. Try and revel/show parts of their lives. You’re not just telling the story through the background though you want your model to show parts of themselves like if the model looks sad it can show that they live a sad life in their eyes or aren’t happy with where they are in life