What is the variation in the area for the flight?

To understand why the answer is 7 degrees East, it's important to consider what "variation" refers to in the context of flight navigation. Variation, also called magnetic declination, is the angle between magnetic north (the direction a compass points) and true north (the direction along the Earth's surface towards the North Pole). This variation can be either east or west, indicating whether magnetic north is to the east or west of true north.

In this case, an area with a variation of 7 degrees East means that if you were using a magnetic compass while flying in that area, you would need to adjust your heading by 7 degrees to navigate correctly towards true north. This indicates that true north lies to the east of magnetic north by 7 degrees, which is a crucial piece of information for pilots who need to ensure accurate navigation during their flights.

The other options likely describe different amounts and directions of magnetic variation, and understanding that variation can change by location is also important in navigation. However, for this particular question, the specified variation of 7 degrees East is the correct value needed for flight navigation in the given area.