5 Refer to the sketch below, which illustrates the development of line thunderstorms during summer. H Stanmorephysic.com H [Source: Examiner's own sketch] 1.5.1 Identify the front at A. (1 x 1) (1) 1.5.2 Give the wind direction at B and C. (2 x 1) (2) 1.5.3 State the moisture content of air masses B and C. (2 x 1) (2) 1.5.4 Explain the formation of line thunderstorms over the interior of South Africa. (3 x 2) (6) 1.5.5 What is the positive impact of the heavy rainfall associated with line thunderstorms on the physical (natural) environment? (2 x 2) (4)​