Final answer:
The true statement is that D. surface winds blow parallel to isobars.
Step-by-step explanation:
The true statement with respect to geographical phenomena among the given options is D. Surface winds blow parallel to isobars. Isobars are lines on a weather map that connect places of equal pressure. Surface winds blow along the isobars, which means they blow parallel to the isobars. This is due to the Coriolis effect, which deflects the path of the winds.
For example, if there is a low-pressure area to the north of a high-pressure area, the surface winds would blow counterclockwise around the low-pressure area and clockwise around the high-pressure area. The isobars would be curved, indicating the direction of the winds.