Final answer:
In the context of Allen's Cognitive Levels, 'Postural Actions' is the category that describes the reliance on postural adjustments in familiar situations.
Step-by-step explanation:
In the "Mode" category of Allen's Cognitive Levels, a category describing reliance on postural adjustments to familiar situations is known as "Postural Actions." This category involves the individual's ability to make automatic adjustments to maintain balance and control movements as part of habitual motor activities. "Postural Actions" are essential in developing motor coordination and function, including maintenance of posture during different tasks or movement transitions.