Final answer:
The phrase "with a heavy heart" means feeling sad or depressed, matching option A) Depression in the multiple-choice question.
Step-by-step explanation:
The phrase "with a heavy heart" typically means that someone is feeling sad or depressed. In the context of the paragraph where the swallow says farewell with a heavy heart, it implies that the swallow is leaving with feelings of sadness or emotional burden.
Therefore, between the options provided, A) Depression reflects the correct meaning of the phrase. This feeling is common in literature and implies a sense of profound melancholy or sorrow often associated with farewells or separation.