The correct answer is option 3, which states that the normal rate of temperature rise with depth from the surface of the Earth to the interior is approximately 1°C per 32 meters. This means that for every 32 meters we descend into the Earth, the temperature increases by 1 degree Celsius.

Option 1, which suggests a temperature rise of 1°C per 185 meters, is incorrect.

Option 2, stating a temperature rise of 1°C per 185 feet is also incorrect.

Option 4, suggesting a temperature rise of 1°C per 32 feet, is not correct either.

It is important to note that these figures are approximate and can vary depending on factors such as location and geological conditions.