To solve this problem, we need to identify the articulation of the glenoid cavity. Let's analyze the options:$\newline \bullet$Option 1: Clavicle with acromion.$\newline$ - The clavicle articulates with the acromion of the scapula at the acromioclavicular joint, but this does not involve the glenoid cavity.$\newline \bullet$Option 2: Scapula with acromion.$\newline$ - The acromion is a part of the scapula, and they do not articulate with each other.$\newline \bullet$Option 3: Clavicle with scapula.$\newline$ - The clavicle articulates with the scapula at the acromioclavicular joint, but this does not involve the glenoid cavity.$\newline \bullet$Option 4: Humerus with scapula.$\newline$ - The glenoid cavity is a part of the scapula that articulates with the head of the humerus to form the shoulder joint, also known as the glenohumeral joint.$\newline$Therefore, the correct articulation involving the glenoid cavity is between the humerus and the scapula.$\newline$This corresponds to Option 4.