Final answer:
Meditation is characterized by focusing attention, interrupting the flow of thoughts, and reducing physical tensions and anxiety.
Step-by-step explanation:
The mental exercise known as meditation is characterized by all of the options provided in the question. Meditation focuses attention, interrupts the typical flow of thoughts, worries, and analysis, and reduces physical tensions and anxiety. It is a practice that involves clearing the mind to achieve a state of relaxed awareness and focus.