You will need to provide the text that you are analysing for a specific answer, but basically, you are looking for any time where the author has used describing words that you would use for humans on object or animal, or where the author is making the object/animal use human characteristics like speech.
the effect that this may have on the piece could be that it creates a friendlier atmosphere if the object/animals are described in a positive and useful way but it can work in reverse as well.
I think that the suffix is or.
Invasive species are an increasing problem
