similar than different because they have important values in common.
Answer: the systematic investigation into and study of materials and sources in order to establish facts and reach new conclusions
These lines taken from "The Snow Man" might be interpreted in these ways. One possibility is to have an objective view of the nature of a winter landscape without attributing any personal emotions to it. The other interpretarion is the assiciation of winter with misery, sadness and loneliness, the feelings that are related to the picture of the wind blowing with just a few leaves.
List the thing(s) you are going to talk about.