Correct Answer: lethargic

Solution : The correct answer is the third option.

The adjective lethargic describes a state of sluggishness or lack of energy, which aligns with the context of Ed being still flaccid and moving slowly due to a lack of blood.

The meanings of the other options are as follows:

Liberal: This word refers to being open-minded or generous, and it does not fit the context of describing Ed's physical state.

Levity: This word refers to lightness or humour, and it doesn't convey the sense of sluggishness or lack of energy mentioned in the sentence.

Levy: This word refers to imposing or collecting a tax, fee, or fine, and it is unrelated to the description of Ed's physical condition.

Therefore, the correct word to fill in the given blank is lethargic.