Equatorial regions experience a hot and humid climate. This means that these regions have high temperatures throughout the year, with very little variation between seasons. The heat is accompanied by high levels of humidity, which refers to the amount of moisture in the air. The combination of heat and humidity can make the climate feel uncomfortable for many people.

Option 1, warm and dry climate, is not accurate for equatorial regions as they typically have high levels of rainfall.

Option 3, wet and windy climate, may occur in some equatorial regions, but it doesn`t represent the general climate pattern. The focus is more on the heat and humidity rather than windiness.

Option 4, moderately pleasant climate, is subjective and can vary depending on personal preferences. Equatorial regions tend to have hot and humid climates, which may not be considered pleasant for everyone.

Therefore, the correct answer is option 2, hot and humid climate.