Because in a liquid they have more space to move. Imagine if you were in a big field verses a crowded little room. In a crowded room you would bump into everyone, which would slow you down.
Drain.
according to the dictionary it is a conduit through which something is drained.
Answer:
dissociation
Explanation:
Dissociation: In abnormal psychology, the term "dissociation" is described as one of the mental processes in which an individual feels disconnected from his or her sense of identity, thoughts, memories, and feelings. However, there are different types of the dissociative disorder including dissociation fugue, dissociation identity disorder, dissociation amnesia, depersonalization disorder.
Signs: Amnesia, derealisation, identity confusion, etc.
In the question above, the given statement signifies the "dissociation".