Question

1. a stationary front differs from other fronts primarily because: it involves no temperature variation air masses are not displacing each other it only occurs in high - pressure systems wind directions remain completely constant

Explanation:

A stationary front forms when two air - masses meet and neither is strong enough to displace the other. Temperature variation can occur across a stationary front, it can be in various pressure systems, and wind directions are not completely constant.

Answer:

Air masses are not displacing each other