Answer:
55º E corresponds to the longitude.
Step-by-step explanation:
We must remember from Geography that any astronomical location on Earth is represented by two components: Latitude and Longitude.
Latitude is the angular distance with respect to the Equator, whereas Longitude is the angular distance with respect to the Greenwich Meridian.
It is quite widespread that Latitude corresponds to the first component of the astronomical location and Longitude is the second one.
Therefore, 55º E corresponds to the longitude.