Read the following poem and answer the question:
Talking in Bed
Talking in bed ought to be easiest,
Lying together there goes back so far, An emblem of two people being honest.
Yet more and more time passes silently. Outside, the wind’s incomplete unrest Builds and disperses clouds about the sky,
And dark towns heap up on the horizon. None of this cares for us. Nothing shows why At this unique distance from isolation
It becomes still more difficult to find
Words at once true and kind,
Or not untrue and not unkinD)
Philip Larkin

The poet says that while lying in bed he and his companion pass time

The correct option is Silently.

Explanation:
In the poem "Talking in Bed" by Philip Larkin, the speaker explores the breakdown of intimacy and communication between two partners. Although the speaker begins by noting that talking in bed "ought to be easiest" and should be "An emblem of two people being honest," this expectation is immediately contradicted by the reality of their relationship.

The poet explicitly states in the second stanza: "Yet more and more time passes silently." This direct textual evidence confirms that instead of speaking, the companions spend their time in silence. Therefore, the correct option is Silently.