1) Affect (verb, noun) - The weather can affect your mood for the day.
affect means something has something happen to them
the affect of the hurricane is the destruction of houses

2) Maintain (verb, noun) - Zoo keepers do their best to maintain the natural habitat of the animals.
to take care of something the zookeeper maintained the exhibit

3) Text (verb, noun) - The text about World War I is confusing; but the text on the human body is very intriguing.
text exerpt from a book the text is hard to read.