It emphasizes tension
In the passage, Death was personified to show how the old
man seems to have perceived his impending death despite not having seen nor
heard the presence of the murderer in the room. Death had the characteristics
of having the ability to stalk, to have a shadow and to envelop its victim. All
of which are humanistic attributes that death in its real sense could not
possibly enact. It creates the tension on the murder that is about to happen
and the thoughts of the murderer on his victim.
The Big Dipper is an asterism in the constellation Ursa Major (the Great Bear). One of the most familiar star shapes in the northern sky, it is a useful navigation tool. Asterisms are prominent groups of stars that form patterns but are smaller than, or even part of, a constellation.
Nouns are people, places, animals or things.
verbs are actions.