Which of the following best describes the action of 'grasping'?

The action of 'grasping' is best described as clutching tightly. This term conveys the idea of firmly holding onto something with a considerable amount of strength or pressure. Grasping implies not only holding an object but doing so in a manner that suggests control or an intention to retain possession. It's often associated with a strong grip that ensures the object does not slip away, which is intrinsic to the definition of the term.

The other choices suggest a lack of control or a weak hold. For instance, holding loosely means that the object is not being held securely, and letting go signifies release, which is opposite to the concept of grasping. Releasing similarly implies the act of freeing or letting an object slide out of one's hold, which again contradicts the essence of grasping as a firm and intentional action. Therefore, the emphasis on tight clutching encapsulates the true nature of grasping effectively.