Explanation:

• Statement 2 is incorrect: The inversion of temperature is responsible for severe frost in the valley floors causing great damage to fruit orchards and vegetables and agricultural crops whereas the upper parts of the valleys are frost free. Supplementary notes: Temperature inversion
• Frontal inversion or cyclonic inversion is caused in the temperate zones due to temperate cyclones which are formed due to the convergence of warm westerlies and cold polar wind in the northern atmosphere.
• It may be pointed out that contrary to other types of temperature inversion, the inversion layer associated with frontal or cyclonic inversion is always sloping because the Coriolis force causes the boundary zone (front) between the warm westerlies and cold polar air masses to become slopy.
• Valley inversion generally occurs in the mountainous valleys due to radiation and vertical movement of air. The air remains warmer than the air aloft and hence the warm and light air of the valley floor is pushed upward by the descending cold and heavier air of the upper part of the valley.
• Thus, there is warm air aloft and cold air in the valley floor and inversion of temperature is caused. This situation is responsible for severe frost in the valley floors causing great damage to fruit orchards and vegetables and agricultural crops whereas the upper parts of the valleys are frost free.
• This is why valley floors are avoided for human settlements while the upper parts are inhabited in the mountainous valleys of middle latitudes.