Through his work, Humboldt challenged European notions about a continent that to some degree had been shaped by people who had never set foot in South America.

yes you could be a life guard if that the question.

you could write about how your feeling. you can talk about times ou thought about the friend in particular.

example, you think about the time you've spent with that friend. like if you had sleep overs at each others place, or activities you did together like going to the movies.

you could talk about others who miss him/her like school mates to neighbors around.