Explanation:

• The Savanna or Sudan Climate is a transitional type of climate found between the equatorial forests and the trade wind hot deserts. It is confined within the tropics and is best developed in the Sudan where the dry and wet seasons are most distinct, hence its name Sudan Climate.
• In South America, there are two distinct regions of savanna north and south of the equator, namely the llanos of the Orinoco basin and the campos of the Brazilian Highlands. The Australian savanna is located south of the monsoon strip running from west to east north of the Tropic of Capricorn.

Climate of the Sudan Type:

• Rainfall: The Sudan type of climate is characterized by an alternate hot, rainy season and cool, dry season. In the northern hemisphere, the hot, rainy season normally begins in May and lasts until September, as in Kano, Nigeria.
• The rest of the year is cool and dry. ü Both the length of the rainy season and the annual total rainfall decrease appreciably from the equatorial region polewards towards the desert fringes. On the whole, the annual precipitation is less than that of the Tropical Monsoon Climate and the length of the wet and dry seasons differs with the locality. In the southern hemisphere, the rainy season is from October to March (the southern summer). Its annual precipitation of 32 inches also varies much from year to year.
• Hence option (c) is the correct answer. o Temperature: The monthly temperature hovers between 79°F. and 90°F. for lowland stations. An annual temperature range of 20°F. is typical, but the range increases as one moves further away from the equator. It is, however, interesting to note that the highest temperatures do not coincide with the period of the highest sun (e.g. June in the northern hemisphere) but occur just before the onset of the rainy season.
• There is also a distinct drop in temperature in the rainy period, due to the overcast sky and the cooler atmosphere.
• Days are hot, and during the hot season, noon temperatures of over 100°F. are quite frequent. When night falls the clear sky which promotes intense heating during the day also causes rapid radiation at night. Temperatures drop to well below 50°E. and night frosts are not uncommon at this time of the year.
• This extreme diurnal range of temperature is another characteristic feature of the Sudan type of climate.