Question 1310Navigation General

The correct answer is D) diurnal variation of pressure. The diurnal variation of pressure is the daily recurring pattern of pressure changes that is most noticeable in low latitudes. This is due to the regular heating and cooling of the Earth's surface caused by the daily cycle of solar radiation, which leads to predictable fluctuations in air pressure. The other options are incorrect because: A) pressure tendency refers to the general change in pressure over a longer period, not the daily cycle; B) daily lapse reading is not a standard meteorological term; and C) synoptic pressure refers to the larger-scale, regional patterns of pressure, not the local daily variations.