The curved line with triangles on the map represents a cold front, and the direction of the front is indicated by the way the triangles are pointing.
The cold front is most likely to affect Dallas in the coming hours and will probably bring rain, wind, and possibly thunderstorms to the Dallas area. After the passage of the cold front, the pressure will rise and the temperature will drop. The wind will now be out of the northwest.
The predictions are no always exact because some winter cold fronts can bring snow and not all cold fronts generate thunderstorms.
The answer is the first option "true." You could reserve minerals in till their value rises which will be more profitable for you. But, if and when technologies make it profitable to extract deposits formerly considered too expensive to remove.
