Concept:The poet's mood is revealed through mocking, bitter language aimed at the bedbug.
Explanation:The poet directly calls the bedbug an "awful parasite" that shares his little bed.
He complains that it sucks blood from his poor head and disturbs his sweet dreams.
He observes that the creature and its family feed on his blood for supper, dinner, and lunch.
He further complains that the bedbug breeds in his bed.
The poet mockingly praises the bedbug as "clever" and a "tiny creature."
He points out that it attacks only when he is fast asleep and cannot capture it.
This exaggerated admiration mixed with irritation is not genuine praise.
The mood is not indifference, joy, or despair, because the poet clearly shows annoyance.
His tone of pretended compliment with underlying bitterness is characteristic of sarcasm.
Answer:A. sarcasm