Respuesta :
A warm front forms when warm air glides up over colder air.
Answer: C. warm air glides up over colder air.
Warm front is a transition zone between warm air mass and cold air mass. A typical warm front moves from a southwest to northeast direction. The air behind the warm front is warmer and moist whereas the air in front is cooler. A warm front bring change to the atmosphere of a region. It makes the atmosphere warmer and humid.
Warm air glides up over colder air results in a formation of warm front as colder air is replaced by warm air.