The correct option is 1 and 3 only.
Explanation
The Tropical Wet Climate (Af), also known as the Equatorial Climate, is typically found between 5° and 10° North and South of the equator. It is dominated by the Intertropical Convergence Zone (ITCZ), resulting in high humidity, significant cloud cover, and consistent thermal conditions throughout the year.
Statement 1 is Correct:
This climate is characterized by adequate rainfall distributed throughout the year with no distinct dry season. The continuous presence of the ITCZ and intense solar heating lead to regular convectional rainfall, often occurring in the afternoons.
Statement 2 is Incorrect:
The annual range of temperature in the Tropical Wet Climate is extremely low, typically less than 3°C. Since the sun is near-vertical throughout the year and the length of day and night is almost equal, there is very little seasonal variation in temperature. The diurnal (daily) range of temperature is usually greater than the annual range.
Statement 3 is Correct:
Despite being in the tropics, the maximum daily temperature rarely exceeds 33°C and is typically around 30°C. The high humidity, abundant vegetation, and heavy cloud cover prevent the extreme heating observed in hot deserts (where temperatures can exceed 45°C).
Key Takeaway:
The Equatorial climate is defined by uniformity: uniform high temperature, uniform heavy rainfall, and a negligible annual temperature range, distinguishing it from Tropical Monsoon or Savanna climates which have distinct seasons.